I do not, in fact, have a favorite YT channel for developers. I hate with a fiery passion the recent fad of making everything that is supposed to be text, maybe text with a few pictures into a video. You cannot search a video. You cannot skim a video. You cannot copy and paste code sample from a video. You cannot watch it offline as easily as you can read a page.
Different learning styles... Sometimes a video is far more effective for me than reading docs or posts. Especially if its a new language/framework/concept.
Also it's nice to see how different developers do their job, I've learned a lot of productive tricks by just watching how other people work.