It should be noted that you only get TWO views per lesson. Usually this is enough. Most people watch just one time. But if you wanted to also watch the lesson, perform the corresponding lab, then watch the lesson again, that is permitted too.
If you need more than two views, for instance, you get called away … that’s fine. You can request more views.
Just don’t abuse the request system.
It’s there to prevent dirtballs from sharing the videos with their friends (which you wouldn’t do; you’re not a dirtball.)