Thanks @Barbara Rogoff for sharing these!! I've heard from students that short videos are super helpful.
I've been using YouTube quite a bit to find videos to supplement my online course materials (you can also create playlists for specific classes so it's easy to find the videos later). These are great because I know students can access them from a link on any device.
Databrary has great resources too and it's great for students to be able to see real participant videos. One thing I try to be mindful of is that lots of parents didn't sign up for their videos to be freely shared on the Internet, so I need to be careful about how I share videos with students that ordinarily I would only play in class.