A:AnswerYes, but it must be purchased separately either at BB or other retail store. It comes with the mounting instructions for wall and stand mounting.
A:AnswerNo. If you have a Netflix account all you need is a WiFi connection. Netflix is preloaded and you just have to activate your account on the tv.
A:AnswerI had this same problem with a mount that I bought from Sams, ended up having to put the arms out straight to the side, without any any angle. I hope your mount has the option to change arm angles.
A:AnswerMy experience is no. It takes a rolling DVR capture of a single channel with first in first out. So, depending on the size of the USB key inserted, it will capture as much as it can but perhaps limited to 50 mins, and then it will capture more current content by discarding the oldest. It is not a generic DVR functionality such that you can record from any channel while watching another. It only records from the current channel and as soon as channels are changed it deletes the prior content entirely and starts recording on the new channel.