You could try Animus: Stand Alone, the android version isn’t available anymore but the PC, Xbox, Switch and iOS versions seem to still be available. It had a sequel called Animus: Harbinger but it seems like only the Switch and iOS versions are the only ones still available. There was also a third Animus game but Revenant is quite different from the first two.
Another game I can recommend is Castlevania: Curse of Darkness. It was only ever available for the PS2 and Xbox but it’s gameplay, especially during bosses, is similar to dark souls.
I don’t think so, YouTube’s new method for blocking third party clients seems to be difficult to work around. I have the Linux version of the NewPipe app and that seems to be working but I don’t use VPNs, so I don’t know if that would work for you.