Xuyao Han’s Interaction: https://xuyaohan.opened.ca/

You tell me the video maker and introduce him. I think it is good to find a professional video maker, which can make the video more believable, academic. For the final question, you said youtube is impossible for interactive learning. I agree with that. There is a video sharing website I know that video audiences can post their comments about videos, and the comments cross the screen, which can make an Interactive learning. The website named Bilibili.