Not my comment, but maybe support isn't the right word. One person I watch on YouTube says something like "if you enjoyed this video, give a thumbs up. If you didn't, give a thumbs down. It helps me understand which topics you find interesting."
OR, hear me out... Subscribe to the patreon or other non-google revenue stream
There's a big distance between clicking the upvote button, which I might do on a dozen of videos a day, to financially supporting creators with $1 or more. If we had actual micro-payments though, that would help.
My understanding is that it promotes the video in "the algorithm", leading to more views and thus higher revenue