We're now going to set access conditions on the assignment:
1. Click on Edit settings for the assignment and scroll down to Restrict access.
2. In the Activity Completion condition box, choose the video page.
3. In the Before activity can be accessed box, choose Hide activity entirely.
We set a condition upon the assignment such that it will only become visible once the student has completed the video page activity. And we already set the completion condition on the video page, in that they have to click on the page and (hopefully!) watch it. Once they have done that, the assignment will become visible.
But there's more....