there are many youtube proxies using a software called invidious, some of which are tor. despite being able to access youtube i exclusively use invidious as i prefer not using google services for the obvious reasons, it is perfectly useable as long as you dont need to watch videos in 4k or whatever
edit: to be clear, invidious instances are not always proxies (as in, often they do everything but actually streaming the video, and still connect your browser to googlevideo . com), so you will have to look for one which is probably