Why does YouTube keep detecting my VPN location?

I’m trying to watch a few YouTube streams that are only available in another country, but every VPN server I test either gets blocked or still shows my real region.

Is this just how YouTube works now, or are there specific VPN features I should be looking for, like residential IPs, dedicated IPs, or better leak protection? I’m not trying to do anything fancy, I just want to understand why regular VPN servers don’t seem to work anymore.