⚫ engagement
⚫ deaf people
⚫ people who don't understand his speech well because English isn't their first language, or they just don't have great hearing
⚫ screenshots of the video will show what he said, I guess it's useful for making out of context memes???

It's for better engagement. Subtitles --> better watchtime --> YouTube recommends their content more.

I found it to be a little effective but troublesome to do for my channel since I'd have to do the captions for my own videos myself. I only do captions for a few select videos but bigger creators can do this for all their videos since they outsource the caption creation to third party sites.

its for hearing impared people?

I saw in a video once that the subtitles are a trick to get better engagement and higher watch time.

I don't really understand someone speaking English, just more in text, because it's not my native language, depending on where the person lives, especially those who speak very fast, I understand almost nothing.

And subtitles generated from YouTube are not 100% accurate, as well as being complicated to read.

Accessibility for deaf people (which is already mentioned) and slow reading/not that great at english people

It is for the deaf people to see what are they talking.

I think it's because the fanbase post the subtitles themselves, not the creators.

Interesting, because they don't subtitle everything. It doesn't make much sense.

for the people who watch it mute, dum dum