YouTube isn't suffering. Lemmy has an active userbase of just over 30K. Given the fact a lot of people have multiple accounts (I do), that's less than 30K active users.
On top of that, probably less than half of Lemmy users actually cry about YouTube.
Even if we are generous, and say the entirety of Lemmy, and each user is unique, 30K is nothing lol.
Tangerine used to have 4-6 digit PIN (no password) to access your online-only account.
Not sure if they still do. I believe so, though.