This is fine to me.

Along with most of the Google boot-licking world. For those with principled objections to feeding Google, it’s not okay.

Tor frontend or not, you could not access anything if google services went down.

This depends on whether the proxy caches videos. Certainly with Newpipe you are hosed because it does not even have a proxy option.

I’m all for people putting content on other platforms, but for now for consuming content from youtube I’m ok with adopting this solution.

This is because you’ve settled with feeding Google, which enables Google to get away with their oppressions like their recent lockout of both the Tor community and the Invidious community. It’s not an acceptable option from a digital sovereignty standpoint.