A:AnswerHi Chris, The width of the stand measures 22 5/8 inches (573 mm). You may refer to this link for more information:
https://www.sony.com/electronics/televisions/xbr-x800e-series/specifications
~Ralph
A:AnswerYes, The TV uses the Google Play Store so you basically have access to the same apps you would find on your Android phone, tablet or Chromebook. A Google acount is required.
A:AnswerHi BigJohn, you may use the built-in streaming apps to watch online videos. However, the internet browser of an Android TV doesn't support video streaming. Thanks! ^Ron
A:AnswerI used Sanus mount, not sure of the model number but it was about $100. Easy to install whether you have concrete or wood studs. You will need to purchase an additional kit if you have metal studs. I also installed openings in the back of the mount for my HDMI, power and ethernet cables. Very nice installation.
A:AnswerI'm not sure how a sound bar connects but, there is one 3.5mm stereo jack for output along with Digital Optical out. However, this TV is Bluetooth capable, so if you're planning to use a wireless Bluetooth headset, you should be good.