to properly search youtube, you have to use google with "site:youtube.com"....

But how long until youtube comments and reddit posts are filled with plausible content made by SEO spammers using ChatGPT?

Since the API was released, guaranteed. No place is safe.

They have the abitity to create transcripts of everything on there, across languages, with the capability to apply good-enough translations to other languages, its insane

I think this is intentional. Those videos for me (unrelated videos to my search) are usually recommended videos and it feels like they are placed there to get you to engage.

When I use search on NewPipe, I get _much_ better results, and those unrelated videos don't show up, presumably because those searches don't use a Google account. I get much better results when I search on NewPipe, and have found some great videos from the normal YouTube frontend search

Youtube makes money by getting people to watch ads. Users aren't the focus and haven't been the focus for years. Their design decisions cater to their customers, advertisers, and their algorithmic needs.

And not just that... if you search for anything that sounds a tiny bit political, all your favorite creators, even the ones you're subscribed to, get hidden from search results, and you're presented with mainstream media results (cnn, msnbc, guardian, huffpost...).