Frontends questions

Sorry, my #2 question was worded poorly, but it seems there are no ways other then switching IPs: How to watch youtube while always-on VPN is present?

Follow-up question:

What is the difference between using the main Youtube app on VPN versus a frontend with a VPN. Both will use my IP to provide me the video and both will also ask me to login if it’s on their banned IP list. I’m still not sure to understand the use of a frontend.