A:AnswerI would think you could. As long as the tv has an input (USB etc) that you could hook it in to. You might have to log in on a computer or smart phone when you do, but I use this on an outdoor projector we have a Roku TV. So it's sort of the same concept.
A:AnswerDeb, for Roku device to work properly you need a TV with an HDMI port and a stable internet connection. If you have those two things it should work. the Roku Streaming Stick is designed to be portable so this would be a good option if you can solve the internet option. Maybe mobile hotspot?
A:AnswerYes, any old headphones will work, and keep in mind you DO NOT HAVE to buy the headphone edition to listen using headphones, you can download the Roku app for free and listen using using headphones connected to your phone :)