I need headphones regularly for learning languages (Duolingo), learning coding, learning about physics etc So there are always Bluetooth headphones in my small bag.

There's no life without them

this is what closed captioning is for, ya know and the other thing

Then you wait until you get home or to an otherwise appropriate venue. No one wants to hear a tutorial they didn't ask for about putting up drywall on their commute home or in the grocery store.

Most yt channels have captions and transcripts. If you really are that desperate to learn how to install a French drain while on the bus, just grab the transcript and whack it into chatgpt to get an article version.

This is not really true in my experience. The vast majority of instructional videos and video essays are just repackaging a text resource, often just the list of references from Wikipedia. I think you're just falling for the veneer of professionalism that makes YouTubers popular, but remember it doesn't actually mean they know what they're talking about any more than a random forum poster. There are of course exceptions, but the glut of instructional videos is just because they're profitable, not because they're actually full of unique knowledge.