Yes that's called routing.
You don't bind it to a NIC, you specify the destinations you want forwarded to each interface. Your VPN connection is just another interface.
If you're looking for good docs, you may want to Google split tunnel vpn, and also bone up on your networking.
A few static routes should get you what you need
Dumb TVs exist, and they're 5x the price of smart TVs.
Ads and data mining subsidizes the hardware cost. If you want cheap TVs you get spyware and ads.