They've likely blocked your VPN because they think you're trying to bypass region restrictions. In this case they don't care whether you're human or not: they simply want to make sure you can't watch videos that would not normally be available in your country.

It's a ridiculous system, but it's unfortunately how media licensing still works.

You could try getting a cheap VPN endpoint device and putting it between your router and your residential internet connection. Then you could VPN to that device to access the (usually-blocked) YouTube while still using your residential IP (assuming the blocking is done on your router).