diff --git a/teaching/machine-learning-ws23/machine-learning-ws23.html b/teaching/machine-learning-ws23/machine-learning-ws23.html
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@@ -318,7 +318,7 @@ <h3 id="topic1">Topic 1: Intro, Python and Maths Basics</h3>
                       <li>Relevant <a href="#lecturenotes">lectures</a>: Until <i>Introduction &gt; Learning Tasks</i></li>
                        <li>Homework (must be solved before your lab session):
                         <ul class="uk-list uk-list-circle">
-                            <li><a href="https://temir.org/teaching/machine-learning-ws23/materials/exercises-en-machine-learning-intro-le-01-homework.pdf">Exercise sheet 1</a> [<a href="https://temir.org/teaching/machine-learning-ws23/materials/exercises-en-machine-learning-intro-le-01-homework-solution.pdf">solution</a> - please review before the lab session] [explanatory videos will be released on 12.10.2023]</li>
+                            <li><a href="https://temir.org/teaching/machine-learning-ws23/materials/exercises-en-machine-learning-intro-le-01-homework.pdf">Exercise sheet 1</a> [<a href="https://temir.org/teaching/machine-learning-ws23/materials/exercises-en-machine-learning-intro-le-01-homework-solution.pdf">solution</a> - please review before the lab session] [explanatory videos: <a href="https://youtu.be/ietCG_PAmwQ">ex. 2</a> | <a href="https://youtu.be/-taRzmBYYCs">ex. 3c</a> | <a href="https://youtu.be/VZHpDjp5jns">ex. 4b</a> | <a href="https://youtu.be/Q57zbFmtk-w">ex. 5a</a> | <a href="https://youtu.be/3TJiPl_vEcU">ex. 5b</a> | <a href="https://youtu.be/EgT3zPkQ-TQ">ex. 5c</a> | <a href="https://youtu.be/ogujb_Pjx-k">ex. 5d</a>]</li>
 							<li>Practical exercise 1 [<a href="https://temir.org/teaching/machine-learning-ws23/materials/01a-Setup.pdf">setup</a> | <a href="https://www.youtube.com/watch?v=zY-JnqwpzI4">video</a> | <a href="https://temir.org/teaching/machine-learning-ws23/materials/requirements.txt">requirements.txt</a>] [<a href="https://temir.org/teaching/machine-learning-ws23/materials/01b-Python.ipynb">python (ipynb)</a>] [<a href="https://temir.org/teaching/machine-learning-ws23/materials/01c-Jupyter.ipynb">jupyter (ipynb)</a>] [<a href="https://temir.org/teaching/machine-learning-ws23/materials/01d-Numpy.ipynb">numpy (ipynb)</a> | <a href="https://www.youtube.com/watch?v=NYJ9BwXST8E">video</a>]</li>
                         </ul>
                         </li>