If I remember correctly you can use ReVanced to login into your Youtube account and have an experience similar to Newpipe. You'd probably have better recommendations (the bot comments depends on the channel though). I've never looked into it, but it seems a popular choice.

Are you able to watch every video normally with invidious and newpipe on Desktop (Linux/Windows) ?

In my experience, yes. For desktop usage you can use invidious from browser and freetube [https://freetubeapp.io/] as external client/software (but I've never used Freetube so I can't comment on that). Newpipe is android only and I HIGHLY recommend it if you have Android.

The problem with invidious instances is that sometimes they get pretty laggy because of server overloads (I guess? honestly idk). You also don't have your account tailored recommendation, but in my experience you can jump around a lot, especially if your main interest are programming videos.

Another method I use is downloading the videos I'm interested into using JDownloader 2, but that's pretty extreme and I relied on this to combat my "algorithm addiction". Got fed up by it months ago, so I put my favourite channels on a RSS feeds and downloaded only the videos I was truly interested into. Usually downloading videos require way less bandwidth than streaming.

(edited for spelling errors, eh)

No, simply because I've never commented on youtube, so it'd be pretty useless, if not counterproductive. Giving even more information about my political/tech ethics to Alphabet doesn't seem smart nor useful in my position. Also, I don't even watch youtube videos on their website now. I usually use invidious instances or newpipe.

But I'm not against people doing it, especially if the ultimate goal is spreading awareness and building a community of people with privacy oriented ideas.