diff --git a/doc/pub/week46/html/._week46-bs001.html b/doc/pub/week46/html/._week46-bs001.html
index c2ebb89bd..6ba00e001 100644
--- a/doc/pub/week46/html/._week46-bs001.html
+++ b/doc/pub/week46/html/._week46-bs001.html
@@ -202,7 +202,6 @@ MathJax.Hub.Config({
 <ol>
 <li> <a href="https://www.youtube.com/watch?v=efR1C6CvhmE&ab_channel=StatQuestwithJoshStarmer" target="_self">Overview video on Support Vector Machines</a></li>
 <li> See also <a href="https://www.youtube.com/watch?v=N1vOgolbjSc&ab_channel=AliceZhao" target="_self">this video</a>.</li>
-<li> <a href="https://www.youtube.com/watch?v=3CC4N4z3GJc&ab_channel=StatQuestwithJoshStarmer" target="_self">Excellent videos on Gradient Boosting</a></li>
 </ol>
 </div>
 </div>
diff --git a/doc/pub/week46/html/week46-reveal.html b/doc/pub/week46/html/week46-reveal.html
index 56bad002e..1d2b9cbd6 100644
--- a/doc/pub/week46/html/week46-reveal.html
+++ b/doc/pub/week46/html/week46-reveal.html
@@ -220,7 +220,6 @@ MathJax.Hub.Config({
 <ol>
 <p><li> <a href="https://www.youtube.com/watch?v=efR1C6CvhmE&ab_channel=StatQuestwithJoshStarmer" target="_blank">Overview video on Support Vector Machines</a></li>
 <p><li> See also <a href="https://www.youtube.com/watch?v=N1vOgolbjSc&ab_channel=AliceZhao" target="_blank">this video</a>.</li>
-<p><li> <a href="https://www.youtube.com/watch?v=3CC4N4z3GJc&ab_channel=StatQuestwithJoshStarmer" target="_blank">Excellent videos on Gradient Boosting</a></li>
 </ol>
 </div>
 </section>
diff --git a/doc/pub/week46/html/week46-solarized.html b/doc/pub/week46/html/week46-solarized.html
index 22c81b1f2..c026a8f3f 100644
--- a/doc/pub/week46/html/week46-solarized.html
+++ b/doc/pub/week46/html/week46-solarized.html
@@ -195,7 +195,6 @@ MathJax.Hub.Config({
 <ol>
 <li> <a href="https://www.youtube.com/watch?v=efR1C6CvhmE&ab_channel=StatQuestwithJoshStarmer" target="_blank">Overview video on Support Vector Machines</a></li>
 <li> See also <a href="https://www.youtube.com/watch?v=N1vOgolbjSc&ab_channel=AliceZhao" target="_blank">this video</a>.</li>
-<li> <a href="https://www.youtube.com/watch?v=3CC4N4z3GJc&ab_channel=StatQuestwithJoshStarmer" target="_blank">Excellent videos on Gradient Boosting</a></li>
 </ol>
 </div>
 
diff --git a/doc/pub/week46/html/week46.html b/doc/pub/week46/html/week46.html
index cd5067971..0f54daac4 100644
--- a/doc/pub/week46/html/week46.html
+++ b/doc/pub/week46/html/week46.html
@@ -272,7 +272,6 @@ MathJax.Hub.Config({
 <ol>
 <li> <a href="https://www.youtube.com/watch?v=efR1C6CvhmE&ab_channel=StatQuestwithJoshStarmer" target="_blank">Overview video on Support Vector Machines</a></li>
 <li> See also <a href="https://www.youtube.com/watch?v=N1vOgolbjSc&ab_channel=AliceZhao" target="_blank">this video</a>.</li>
-<li> <a href="https://www.youtube.com/watch?v=3CC4N4z3GJc&ab_channel=StatQuestwithJoshStarmer" target="_blank">Excellent videos on Gradient Boosting</a></li>
 </ol>
 </div>
 
diff --git a/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz b/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz
index 52efbbf61..be2e82abc 100644
Binary files a/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz and b/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz differ
diff --git a/doc/pub/week46/ipynb/week46.ipynb b/doc/pub/week46/ipynb/week46.ipynb
index 754f6de36..4ff96e730 100644
--- a/doc/pub/week46/ipynb/week46.ipynb
+++ b/doc/pub/week46/ipynb/week46.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "567e1a63",
+   "id": "bb0e9a49",
    "metadata": {
     "editable": true
    },
@@ -14,7 +14,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "916db772",
+   "id": "197cb396",
    "metadata": {
     "editable": true
    },
@@ -29,7 +29,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7f819881",
+   "id": "cb2960bb",
    "metadata": {
     "editable": true
    },
@@ -53,14 +53,12 @@
     "\n",
     "1. [Overview video on Support Vector Machines](https://www.youtube.com/watch?v=efR1C6CvhmE&ab_channel=StatQuestwithJoshStarmer)\n",
     "\n",
-    "2. See also [this video](https://www.youtube.com/watch?v=N1vOgolbjSc&ab_channel=AliceZhao).\n",
-    "\n",
-    "3. [Excellent videos on Gradient Boosting](https://www.youtube.com/watch?v=3CC4N4z3GJc&ab_channel=StatQuestwithJoshStarmer)"
+    "2. See also [this video](https://www.youtube.com/watch?v=N1vOgolbjSc&ab_channel=AliceZhao)."
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "a839e1c5",
+   "id": "7ccc26b2",
    "metadata": {
     "editable": true
    },
@@ -88,7 +86,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fca4e478",
+   "id": "23ba373b",
    "metadata": {
     "editable": true
    },
@@ -109,7 +107,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "12e5033f",
+   "id": "9104d819",
    "metadata": {
     "editable": true
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@@ -143,7 +141,7 @@
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   {
    "cell_type": "markdown",
-   "id": "01c72cf0",
+   "id": "c2ec8b65",
    "metadata": {
     "editable": true
    },
@@ -165,7 +163,7 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "id": "ef0489f9",
+   "id": "11035e6d",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -244,7 +242,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4e61218b",
+   "id": "a9ff95b1",
    "metadata": {
     "editable": true
    },
@@ -264,7 +262,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a7e147b7",
+   "id": "bf1a4722",
    "metadata": {
     "editable": true
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@@ -276,7 +274,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4ca9af89",
+   "id": "029713be",
    "metadata": {
     "editable": true
    },
@@ -289,7 +287,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2fb9c2c6",
+   "id": "e317dcae",
    "metadata": {
     "editable": true
    },
@@ -301,7 +299,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "094bfda9",
+   "id": "951a0916",
    "metadata": {
     "editable": true
    },
@@ -314,7 +312,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f365e03a",
+   "id": "a3a64eae",
    "metadata": {
     "editable": true
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@@ -326,7 +324,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "64f75768",
+   "id": "99e023c2",
    "metadata": {
     "editable": true
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@@ -338,7 +336,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "929fecfe",
+   "id": "5c909a59",
    "metadata": {
     "editable": true
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@@ -350,7 +348,7 @@
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   {
    "cell_type": "markdown",
-   "id": "1160e1e6",
+   "id": "6a8f1640",
    "metadata": {
     "editable": true
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@@ -360,7 +358,7 @@
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   {
    "cell_type": "markdown",
-   "id": "9219f68a",
+   "id": "29a9faad",
    "metadata": {
     "editable": true
    },
@@ -372,7 +370,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6602469d",
+   "id": "844169cc",
    "metadata": {
     "editable": true
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@@ -383,7 +381,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "eb40839b",
+   "id": "1be5c316",
    "metadata": {
     "editable": true
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@@ -395,7 +393,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9164b51b",
+   "id": "c4fd9f00",
    "metadata": {
     "editable": true
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@@ -408,7 +406,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ef4713ea",
+   "id": "273f3fe1",
    "metadata": {
     "editable": true
    },
@@ -420,7 +418,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "75793850",
+   "id": "a89b7a4e",
    "metadata": {
     "editable": true
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@@ -430,7 +428,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f2fe3599",
+   "id": "b4738581",
    "metadata": {
     "editable": true
    },
@@ -459,7 +457,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b99c053f",
+   "id": "af458276",
    "metadata": {
     "editable": true
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@@ -471,7 +469,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b3fcc19d",
+   "id": "986a85d2",
    "metadata": {
     "editable": true
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@@ -483,7 +481,7 @@
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   {
    "cell_type": "markdown",
-   "id": "6bf591e4",
+   "id": "8be2e390",
    "metadata": {
     "editable": true
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@@ -497,7 +495,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "353c8da7",
+   "id": "776e7963",
    "metadata": {
     "editable": true
    },
@@ -509,7 +507,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1df7a0fe",
+   "id": "a58eafa3",
    "metadata": {
     "editable": true
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@@ -523,7 +521,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "52cbe732",
+   "id": "26d7cfb4",
    "metadata": {
     "editable": true
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@@ -535,7 +533,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "53800df3",
+   "id": "ee4089fa",
    "metadata": {
     "editable": true
    },
@@ -545,7 +543,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f5eacbe7",
+   "id": "06fad21b",
    "metadata": {
     "editable": true
    },
@@ -557,7 +555,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "55196665",
+   "id": "3ec12abf",
    "metadata": {
     "editable": true
    },
@@ -567,7 +565,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "32ce92bd",
+   "id": "488d93d0",
    "metadata": {
     "editable": true
    },
@@ -579,7 +577,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "78bcf4f1",
+   "id": "e042071e",
    "metadata": {
     "editable": true
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@@ -591,7 +589,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f8ef5370",
+   "id": "38443b86",
    "metadata": {
     "editable": true
    },
@@ -603,7 +601,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "37edfee8",
+   "id": "942c0154",
    "metadata": {
     "editable": true
    },
@@ -613,7 +611,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b8dadfdb",
+   "id": "edfa493d",
    "metadata": {
     "editable": true
    },
@@ -625,7 +623,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5e87a3ed",
+   "id": "834c172f",
    "metadata": {
     "editable": true
    },
@@ -635,7 +633,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "105f7bde",
+   "id": "7598a34c",
    "metadata": {
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@@ -649,7 +647,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "587bcf7b",
+   "id": "04cd9f15",
    "metadata": {
     "editable": true
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@@ -668,7 +666,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "65813b86",
+   "id": "36b3c0c2",
    "metadata": {
     "editable": true
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@@ -684,7 +682,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "06df05c0",
+   "id": "496b8041",
    "metadata": {
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@@ -696,7 +694,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8401a19d",
+   "id": "4b76a3d1",
    "metadata": {
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@@ -708,7 +706,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9d609823",
+   "id": "06dc828e",
    "metadata": {
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@@ -720,7 +718,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ffcb2816",
+   "id": "94e1e6ee",
    "metadata": {
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@@ -730,7 +728,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a3aaff4d",
+   "id": "65ebe2a3",
    "metadata": {
     "editable": true
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@@ -742,7 +740,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "312d7b00",
+   "id": "0d5c2d9a",
    "metadata": {
     "editable": true
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@@ -753,7 +751,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cb022fd8",
+   "id": "054fce8e",
    "metadata": {
     "editable": true
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@@ -765,7 +763,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "350379c4",
+   "id": "39f8a252",
    "metadata": {
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@@ -778,7 +776,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "30552867",
+   "id": "7d2b8841",
    "metadata": {
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@@ -791,7 +789,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5dfc0581",
+   "id": "79221654",
    "metadata": {
     "editable": true
    },
@@ -803,7 +801,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8f0b4a58",
+   "id": "0cad89a8",
    "metadata": {
     "editable": true
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@@ -813,7 +811,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f6ff5ef7",
+   "id": "7911f062",
    "metadata": {
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@@ -825,7 +823,7 @@
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   {
    "cell_type": "markdown",
-   "id": "aa0dba43",
+   "id": "d414610f",
    "metadata": {
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@@ -835,7 +833,7 @@
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   {
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-   "id": "820ab4d8",
+   "id": "f3222431",
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@@ -847,7 +845,7 @@
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   {
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-   "id": "d69d44cc",
+   "id": "5bcff126",
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@@ -864,7 +862,7 @@
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   {
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+   "id": "0a63791a",
    "metadata": {
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@@ -876,7 +874,7 @@
   },
   {
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-   "id": "89882267",
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@@ -886,7 +884,7 @@
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@@ -898,7 +896,7 @@
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   {
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@@ -908,7 +906,7 @@
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   {
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-   "id": "9aca006d",
+   "id": "7c85cfdc",
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@@ -920,7 +918,7 @@
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@@ -933,7 +931,7 @@
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@@ -945,7 +943,7 @@
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@@ -957,7 +955,7 @@
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@@ -967,7 +965,7 @@
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@@ -981,7 +979,7 @@
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@@ -991,7 +989,7 @@
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@@ -1003,7 +1001,7 @@
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@@ -1013,7 +1011,7 @@
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@@ -1025,7 +1023,7 @@
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@@ -1035,7 +1033,7 @@
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@@ -1047,7 +1045,7 @@
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@@ -1061,7 +1059,7 @@
   },
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+   "id": "b92645c3",
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@@ -1073,7 +1071,7 @@
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+   "id": "31215905",
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@@ -1084,7 +1082,7 @@
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@@ -1096,7 +1094,7 @@
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+   "id": "d88640f0",
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@@ -1108,7 +1106,7 @@
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+   "id": "ce1a18a2",
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@@ -1120,7 +1118,7 @@
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+   "id": "b150c038",
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@@ -1130,7 +1128,7 @@
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+   "id": "795702e5",
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@@ -1142,7 +1140,7 @@
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-   "id": "76aea001",
+   "id": "a5f95104",
    "metadata": {
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@@ -1152,7 +1150,7 @@
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   {
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-   "id": "3a0ff99e",
+   "id": "b6ecc7a5",
    "metadata": {
     "editable": true
    },
@@ -1164,7 +1162,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c4781289",
+   "id": "0c9d4cc9",
    "metadata": {
     "editable": true
    },
@@ -1175,7 +1173,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "de178dd1",
+   "id": "e7e74a58",
    "metadata": {
     "editable": true
    },
@@ -1187,7 +1185,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b5db2c83",
+   "id": "1d4da337",
    "metadata": {
     "editable": true
    },
@@ -1201,7 +1199,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bc2afd47",
+   "id": "7e82cdbd",
    "metadata": {
     "editable": true
    },
@@ -1213,7 +1211,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e573a64c",
+   "id": "ca8b97fe",
    "metadata": {
     "editable": true
    },
@@ -1225,7 +1223,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "257e9b3d",
+   "id": "30859b78",
    "metadata": {
     "editable": true
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@@ -1235,7 +1233,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f26f6b58",
+   "id": "e144d2c7",
    "metadata": {
     "editable": true
    },
@@ -1252,7 +1250,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1599e578",
+   "id": "3a26657b",
    "metadata": {
     "editable": true
    },
@@ -1263,7 +1261,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1a33a183",
+   "id": "cdea8dac",
    "metadata": {
     "editable": true
    },
@@ -1276,7 +1274,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2ab28445",
+   "id": "5074064a",
    "metadata": {
     "editable": true
    },
@@ -1288,7 +1286,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "86502b2e",
+   "id": "b2bb7e20",
    "metadata": {
     "editable": true
    },
@@ -1298,7 +1296,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "20882079",
+   "id": "e95ef253",
    "metadata": {
     "editable": true
    },
@@ -1310,7 +1308,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4dc69268",
+   "id": "0a286384",
    "metadata": {
     "editable": true
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@@ -1320,7 +1318,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a0a76729",
+   "id": "3e3e0540",
    "metadata": {
     "editable": true
    },
@@ -1332,7 +1330,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "830cd81f",
+   "id": "0a1da980",
    "metadata": {
     "editable": true
    },
@@ -1342,7 +1340,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9b5f95c5",
+   "id": "d9014aaa",
    "metadata": {
     "editable": true
    },
@@ -1354,7 +1352,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4df6eb59",
+   "id": "4a068778",
    "metadata": {
     "editable": true
    },
@@ -1364,7 +1362,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e5d711eb",
+   "id": "610610d9",
    "metadata": {
     "editable": true
    },
@@ -1376,7 +1374,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "63eaa03c",
+   "id": "ddcab6c6",
    "metadata": {
     "editable": true
    },
@@ -1386,7 +1384,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "227f540c",
+   "id": "f19be3ea",
    "metadata": {
     "editable": true
    },
@@ -1406,7 +1404,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "93a5a36e",
+   "id": "6fddeed4",
    "metadata": {
     "editable": true
    },
@@ -1418,7 +1416,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d00acfdb",
+   "id": "e9f9c2b8",
    "metadata": {
     "editable": true
    },
@@ -1428,7 +1426,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c99d2769",
+   "id": "80780565",
    "metadata": {
     "editable": true
    },
@@ -1440,7 +1438,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3c1267db",
+   "id": "e47e3ea3",
    "metadata": {
     "editable": true
    },
@@ -1456,7 +1454,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fc6e7b90",
+   "id": "76ce6579",
    "metadata": {
     "editable": true
    },
@@ -1468,7 +1466,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f0bb7bcf",
+   "id": "7186fdb4",
    "metadata": {
     "editable": true
    },
@@ -1480,7 +1478,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "70902a76",
+   "id": "cbb5ce49",
    "metadata": {
     "editable": true
    },
@@ -1490,7 +1488,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7adf196c",
+   "id": "d21feca5",
    "metadata": {
     "editable": true
    },
@@ -1502,7 +1500,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "97d00a31",
+   "id": "d291d5b4",
    "metadata": {
     "editable": true
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@@ -1514,7 +1512,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1a67e7ff",
+   "id": "9dddf6e5",
    "metadata": {
     "editable": true
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@@ -1526,7 +1524,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5d710703",
+   "id": "f2accef2",
    "metadata": {
     "editable": true
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@@ -1536,7 +1534,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "519651fd",
+   "id": "ea51ed7e",
    "metadata": {
     "editable": true
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@@ -1548,7 +1546,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2f9b6f35",
+   "id": "d9d38728",
    "metadata": {
     "editable": true
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@@ -1558,7 +1556,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "713be4f8",
+   "id": "0176ca09",
    "metadata": {
     "editable": true
    },
@@ -1570,7 +1568,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0372d9d4",
+   "id": "2d5ba4ac",
    "metadata": {
     "editable": true
    },
@@ -1580,7 +1578,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bfa7b965",
+   "id": "3dc66498",
    "metadata": {
     "editable": true
    },
@@ -1592,7 +1590,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8308a28f",
+   "id": "61ba6563",
    "metadata": {
     "editable": true
    },
@@ -1603,7 +1601,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6e5c9afa",
+   "id": "fcab35d9",
    "metadata": {
     "editable": true
    },
@@ -1615,7 +1613,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "453eddd3",
+   "id": "6d55780a",
    "metadata": {
     "editable": true
    },
@@ -1627,7 +1625,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5dc0a215",
+   "id": "974bac36",
    "metadata": {
     "editable": true
    },
@@ -1637,7 +1635,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a41f74a6",
+   "id": "1f1f61c6",
    "metadata": {
     "editable": true
    },
@@ -1649,7 +1647,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e34ece8b",
+   "id": "ad6701ce",
    "metadata": {
     "editable": true
    },
@@ -1675,7 +1673,7 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "id": "a305a5cb",
+   "id": "a0176eed",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1732,7 +1730,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7f4a1fc7",
+   "id": "5a71c59f",
    "metadata": {
     "editable": true
    },
@@ -1744,7 +1742,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "29de5216",
+   "id": "bfb67332",
    "metadata": {
     "editable": true
    },
@@ -1756,7 +1754,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "67a2e7d1",
+   "id": "d31967c1",
    "metadata": {
     "editable": true
    },
@@ -1766,7 +1764,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3c55a15f",
+   "id": "6d54aca4",
    "metadata": {
     "editable": true
    },
@@ -1778,7 +1776,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2f830daf",
+   "id": "0161d417",
    "metadata": {
     "editable": true
    },
@@ -1788,7 +1786,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bc2143d1",
+   "id": "d24ef76a",
    "metadata": {
     "editable": true
    },
@@ -1800,7 +1798,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6c6ea11b",
+   "id": "90a141ce",
    "metadata": {
     "editable": true
    },
@@ -1811,7 +1809,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e0187a98",
+   "id": "50144e6a",
    "metadata": {
     "editable": true
    },
@@ -1823,7 +1821,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "17aa59e9",
+   "id": "7af267c8",
    "metadata": {
     "editable": true
    },
@@ -1833,7 +1831,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "52cda469",
+   "id": "850ed205",
    "metadata": {
     "editable": true
    },
@@ -1845,7 +1843,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d4660bbf",
+   "id": "36aa6529",
    "metadata": {
     "editable": true
    },
@@ -1863,7 +1861,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "aa9988fe",
+   "id": "685710cf",
    "metadata": {
     "editable": true
    },
@@ -1874,7 +1872,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c604041c",
+   "id": "64571b79",
    "metadata": {
     "editable": true
    },
@@ -1886,7 +1884,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8889e0fb",
+   "id": "420d4cc4",
    "metadata": {
     "editable": true
    },
@@ -1896,7 +1894,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "56d81f6c",
+   "id": "4bffb376",
    "metadata": {
     "editable": true
    },
@@ -1913,7 +1911,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0a6d3d78",
+   "id": "1aa02675",
    "metadata": {
     "editable": true
    },
@@ -1927,7 +1925,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ae062b05",
+   "id": "8f27a871",
    "metadata": {
     "editable": true
    },
@@ -1942,7 +1940,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a7342733",
+   "id": "c034d8d8",
    "metadata": {
     "editable": true
    },
@@ -1954,7 +1952,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "de24ad0d",
+   "id": "6d263726",
    "metadata": {
     "editable": true
    },
@@ -1982,7 +1980,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a166c517",
+   "id": "a61a03f2",
    "metadata": {
     "editable": true
    },
@@ -1994,7 +1992,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a8e82806",
+   "id": "22516735",
    "metadata": {
     "editable": true
    },
@@ -2009,7 +2007,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "67524f1b",
+   "id": "8cab3fab",
    "metadata": {
     "editable": true
    },
@@ -2020,7 +2018,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "id": "c89969fa",
+   "id": "45c78861",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2219,7 +2217,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "db4fa0f5",
+   "id": "a2798a5c",
    "metadata": {
     "editable": true
    },
@@ -2231,7 +2229,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "905f6381",
+   "id": "621007c5",
    "metadata": {
     "editable": true
    },
@@ -2246,7 +2244,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f1dae165",
+   "id": "0466ee50",
    "metadata": {
     "editable": true
    },
@@ -2263,7 +2261,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4c62d7d3",
+   "id": "57cf7c7b",
    "metadata": {
     "editable": true
    },
@@ -2284,7 +2282,7 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "id": "98744f2d",
+   "id": "5a1cd8f3",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2297,7 +2295,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8e50af18",
+   "id": "2ac3327c",
    "metadata": {
     "editable": true
    },
@@ -2307,7 +2305,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3ea325f1",
+   "id": "7e48d765",
    "metadata": {
     "editable": true
    },
@@ -2319,7 +2317,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8b4f6a8b",
+   "id": "14be790a",
    "metadata": {
     "editable": true
    },
@@ -2334,7 +2332,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6075579f",
+   "id": "34db8fd3",
    "metadata": {
     "editable": true
    },
@@ -2344,7 +2342,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c1da0e28",
+   "id": "3039a316",
    "metadata": {
     "editable": true
    },
@@ -2363,7 +2361,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "495d0e25",
+   "id": "a5bffcc3",
    "metadata": {
     "editable": true
    },
@@ -2373,7 +2371,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "16a514fa",
+   "id": "8cbc9fc8",
    "metadata": {
     "editable": true
    },
@@ -2385,7 +2383,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d5e1aa0e",
+   "id": "d4acbcf2",
    "metadata": {
     "editable": true
    },
@@ -2395,7 +2393,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ac2d0292",
+   "id": "305d334d",
    "metadata": {
     "editable": true
    },
@@ -2407,7 +2405,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "725e454b",
+   "id": "7d011eb5",
    "metadata": {
     "editable": true
    },
@@ -2417,7 +2415,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5c056543",
+   "id": "15e3134c",
    "metadata": {
     "editable": true
    },
@@ -2429,7 +2427,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d9ae06af",
+   "id": "eff3bb3d",
    "metadata": {
     "editable": true
    },
@@ -2440,7 +2438,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3464d420",
+   "id": "bf2cf063",
    "metadata": {
     "editable": true
    },
@@ -2452,7 +2450,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "805e1791",
+   "id": "e85fe5ff",
    "metadata": {
     "editable": true
    },
@@ -2464,7 +2462,7 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "id": "69cd0082",
+   "id": "334ecffa",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2488,7 +2486,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ee8e953a",
+   "id": "0b4422f8",
    "metadata": {
     "editable": true
    },
@@ -2500,7 +2498,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "19040f29",
+   "id": "e8a3d920",
    "metadata": {
     "editable": true
    },
@@ -2517,7 +2515,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bfa52bf0",
+   "id": "fcd43ab8",
    "metadata": {
     "editable": true
    },
diff --git a/doc/src/week46/week46.do.txt b/doc/src/week46/week46.do.txt
index 258a131c2..b6687959f 100644
--- a/doc/src/week46/week46.do.txt
+++ b/doc/src/week46/week46.do.txt
@@ -20,7 +20,6 @@ Reading recommendations:
 !bblock Videos
 o "Overview video on Support Vector Machines":"https://www.youtube.com/watch?v=efR1C6CvhmE&ab_channel=StatQuestwithJoshStarmer"
 o See also "this video":"https://www.youtube.com/watch?v=N1vOgolbjSc&ab_channel=AliceZhao".
-o "Excellent videos on Gradient Boosting":"https://www.youtube.com/watch?v=3CC4N4z3GJc&ab_channel=StatQuestwithJoshStarmer"
 !eblock