I feel like really short info-animations work best on youtube. something short and snappy, not just some random person vloging.
Do you mean like a few of Hass's examples?
Bit of both.
Agree with all of that - that's why I had to vote bit of both.
I often want to watch videos but am pressed for time. Especially when I waste it challenging the veracity of a long standing and well-loved member here. No I don't mean Bahira.

Its not even that I am pressed for time, I have fuck all to do at the moment, I just prefer to read my information.
Doesn't really matter how captivating or how expressive the person speaking is, I zone out the moment the video starts. I try to focus, really I do, but it's all noise to me.
The voice of someone with interest in the subject holds my attention better for such subjects.
Lol I wish I could, would be handy to be able to listen to stuff whilst doing other things, but it is the sound of their voice, no matter how passionate they are, that actually makes me tune out.