made a set of questions and added link to video

book/exercises/001.md

@@ -18,21 +18,12 @@ Can you add some content to the intro page?
 ```{hint} Watch the steps in action below
 :class: dropdown
 ![First file edit guide](https://github.com/TeachBooks/template_figures/blob/main/excercise1.gif?raw=true)
-```
-
-```{admonition} Check your understanding
-:class: note
 
-Before moving on to the next exercise, make sure you understand the following:
-- Where are the contents of the book stored?
-- How can you edit a single file via the GitHub browser interface?
-- What is a commit and what role does it play in the editing process?
-- Given a specific GitHub repository, can you determine the URL of the book website?
-- How can you view the changes you made to the book?
-- What is the purpose of a commit message and description?
+[Or watch the video here](https://youtu.be/gn1zBmmunco)
 ```
+
 :::{card} Check your understanding
-<iframe src="https://tudelft.h5p.com/content/1292493444533374767/embed" aria-label="Test your Teachbooks knowledge" width="1088" height="637" frameborder="0" allowfullscreen="allowfullscreen" allow="autoplay *; geolocation *; microphone *; camera *; midi *; encrypted-media *"></iframe><script src="https://tudelft.h5p.com/js/h5p-resizer.js" charset="UTF-8"></script>
+<iframe src="https://tudelft.h5p.com/content/1292494525712285897/embed" aria-label="Testing your knowledge" width="1088" height="637" frameborder="0" allowfullscreen="allowfullscreen" allow="autoplay *; geolocation *; microphone *; camera *; midi *; encrypted-media *"></iframe><script src="https://tudelft.h5p.com/js/h5p-resizer.js" charset="UTF-8"></script>
 :::
 
 :::{card} Check your understanding