I use their WireGuard endpoint with the WireGuard app in iOS. I have the WireGuard app icon next to YT and toggle it as I start using and stop using YT. I’ve set mullvad dns to also block ads etc so if I forget to turn the VPN off it’s not a big deal.

I tried selective routing but it’s impossible to figure out the YT IPs. They overlap with GCP infra and a lot of apps block connections from Albania so they break and the VPN has to be toggled.

If someone knows of a list that only includes YT servers I’d love that because wireguard lets you do routing easily if you have CIDR blocks.