A:AnswerYou will want to use your digital optical cable and connect it from digital optical out port on the TV to the digital optical in port on the soundbar. You will then need to go to the TV's sound settings and select external speakers with the digital optical as your speaker output.
A:AnswerBest Buy would be happy to mount your TV ... at a price! Check their info on "delivery" ... you'll find their various fees. Be sure to keep checking, though because their fees seem to keep increasing!
A:AnswerYes. I found it on their Smart Hub along with a few other apps. I have not used the amazon video app, but it appears to start up asking one to sign in, register for a new account, or skip the above and begin browsing.
We have only had the TV a few weeks so there are lots of things I have not used yet.