The problem lies in the screen update. I would like to be able to keep a cache of the thumbnail image on disk to help avoid remote calls and it would also be interesting to know which video has gone down. So that image cache would be a nice feature to have.
Every time I open a note with a YouTube video I have to wait for it to load, and it’s usually very slow. It would be better if Obsidian load the thumbnail of the video first and when you click on it, load the real video!