I would be hesitant to do this. If it's maybe 1 or 2 videos and they are relevant, then I think it's OK. But imagine your students thinking that they just paid money to get links to youtube videos... that's a recipe for refunds and low course ratings. That said, in one of my courses I provide a link to a video on my youtube channel (the video is my creation, not someone else's video), but I make it clear to students that it's a resource for students who want to learn more about that topic, and it isn't actually part of the course.
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