I used youtube TV a few years ago when I went south for the winter.
Two issues:
1. They want to work to your home market. When you sign up they set that market. If you moved out of the market, you could access the original market for 3 months. So you need to be in Buffalo/Rochester when you sign up.
2. You can not watch live. As soon as the game is over, it is available but never live except for the market you are in currently - those are live.
I got around these by setting the home market as Rochester and then watching delayed on my laptop. I did not like watching delayed so I gave it up. To the bar I go when they do not play nationally and I am in Texas.
I am hoping Sunday ticket moves to another provider after this year.
Good luck.