I'm german and watch the Steelers games on the Gamepass if they are not aired on this one channel here that show like 5 games a week (Thurs, Mon, Trippleheader Sun). My PC is connected with my 55" TV and it really is like HD. That depends on your connections speed tho, obviously.
I dont really have a Gamepass account. For some reasons, Argentina and the Netherlands get the GP for free. So I simply search for a Proxy of one of this countrys, start the "free" gamepass on Gamepass.nfl.com and start the game. They only check your location by the IP once when starting the video of the game, so,once the video is loaded, I disable the Proxy and enjoy the Game with my full bandwidth. This works everywhere, even in the US an Canada. (Yeah, really. It's FREE !). Its also nice cause you can watch games even if they are actually blacked out(since when they check your IP, you appear to be from ARG/NL).
Unfortunately, they started to blacklist many proxys, so I always gotta find a working one. Takes up to 20 minutes sometimes. I just look for one 30 minutes before the game starts and leave the GP window open then till kickoff.
The Preseason ist free this way too. Dunno if they are included in this package you posted but I guess so.
PM me if there are more questions.