[usrn]

Google does not change YouTube recommendations based on your IP, it's entirely based on cookies, they have no way to tell how many people are behind the NAT.

Try going to YouTube in private mode. Personally I always use YouTube this way to avoid being pigeonholed.

EDIT: I've exceeded my post quota for today so here's my reply: That's interesting. I've moved ~4 times and have used different ISPs since I started this habit. Perhaps your private session wasn't restarted? In Firefox you have to close all of the private windows before you get a fresh cookie jar etc. It might also be that you don't deviate far from the popular videos. Every time I start a new private session there isn't a single recommendation that matches what I normally watch.

[guuggye]

It's possible my viewing habits overlap with say 68% of others. But I've seen recommendations that match what I would assume to be my more niche interests. As for not closing all private browsing tabs, I've made that mistake before, but I still see the same pattern of recommendations when using single session browsers or separate devices.

Thanks again for the follow-up.

[guuggye]

That hasn't been my experience, when opening a private window the default feed I see on YouTube mostly matches what I would see if logged in.

[eternityforest]

Do they have ways besides IP to track you there? Some kind of browser fingerprinting? Or that FLOC thing?

Maybe used in combination with IP?

[guuggye]

Yeah I'm unsure what information they use or have access to in order to form recommendations. But I'm almost certain it's not limited to just IP addresses.