We use Youtube often in my room to enhance student learning. I specifically use it with our Lucy Calkins curriculum as several of her lessons refer students to videos to watch and analyze. We also use it when teaching about historical topics. Here are some videos/ youtubers I use frequently in class.
Pixar shorts
https://www.youtube.com/results?search_query=pixar+shortsScience fun for kids
https://www.youtube.com/user/crashcoursekidsmath lessons
https://www.youtube.com/channel/UCY-ywrKyfsSFF1tILNH1pNA