Nah, I used to have a YouTube plugin that worked years ago but don't any more. I don't use it for "TV" purposes, though, it's more of a home cinema device. I don't have background screens in my house.
But my point wasn't literally to use a Raspberry Pi 2, just that you can get cheap low power devices that beat "smart TV" crap. You can of course get much more recent ARM-based boards that support all the latest HD standards etc. I don't do the hedonic treadmill, though, so I'm still happy with 1080p Blu-ray.