I think the situation that people run into is something like "how do I install a faucet" and they are getting someone who does it for a living explaining it for the first time. Explaining it for the first time is what makes it tough to make a good video. Then there are other things like "top 10 AskReddit threads that I feel like stealing from this week" and those are too long because they are just trying to get as much ad revenue as possible. The original comment was about howtos specifically, and I think you are likely to run into a lot of one-off channels in those cases.
Making a long video isn't like writing a rambling letter. It takes work to make 10 minutes of talk out of a 1-minute subject. And mega-popular influencers do this, not just newbs who haven't learned how to edit properly yet.
This is something that happens a lot. I'll Google a narrow technical question that can be answered in three lines of text--there's literally nothing more of value to say about it--and all the top hits are 5+ minute videos. That doesn't happen by accident.
I definitely write super long things when I consciously make the decision to not spend much time on something. Meanwhile, I've been working on a blog post for the better part of 2 years because it's too long, but doesn't cover everything I want to discuss. If you want people to retain the content, you have to pare it down to the essentials! This is hard work.