If YouTube ever renames or even just moves that button, millions of videos will suddenly be “broken”.

This already happened when they got rid of the 5-star rating in favor of the like button. "Rate 5 stars and subscribe" became "Like and subscribe". People will adapt.

Still funny in old videos or when they point to the right-hand side when the video info was there.

No worries, they will also introduce an AI "rephrase" (no way to opt-out) which will "translate" these in real-time!