As always, ‘it depends’. I know he’s not YT strictly speaking but I love learning from Wes Bos. But the first time I watched him I was like holy shit boy, slow down! I thought it was terrible.

Then I learned some more, which got me to the stage where I knew what the hell he was on about, and now I love him. Information at its maximum density.

It's always better if they speak a bit too fast, since you can pause at any time to digest what was said.

I watch most videos at triple speed or above. Takes some getting used to, but my brain got accustomed to it over time and now I can watch 3-4 times more youtube than everyone else in the same amount of time!

Even when you do that you can't beat skimming and finding exactly what you need in a text. In a video it's clunky to scrub around and hope you hit the relevant info you need.