The only one I watch is Donnaleigh's. I always learn something from her videos, and have been a fan for years. Was privileged to meet her at Readers Studio a few years ago, she is just delightful.
I have watched many others (or at least tried to).
Obviously, I am in the distinct minority here, but so be it. I can't stand to hear:
a. You look tired
b. Your hair isn't combed
c. Your camera isn't working for some reason
d. It's 38 degrees outside
e. Sorry that your dog/cat/kids are noisy in another room
f. You haven't made a video in x days/weeks/months
If these YouTubers don't grab my attention in 30 seconds, it's goodbye! I won't waste precious time while they ramble on and on about...nothing really. It doesn't take much time to do a bit of preparation before turning on the camera. A few notes, an outline, a goal...I'm not interested in stream of consciousness dithering.
Sorry for the rant, but as a teacher, these things really annoy me.