[yen223]

My front-page recommendations in incognito is a completely different set of videos from my front-page recommendations in my logged-in main account, except for one (a Veritasium video with 14 million views).

So if YouTube is tracking me across incognito mode, then they aren't doing a very good job there.

[justsomehnguy]

They can't be too obvious about that. So works as intended.