I don't know if anyone else has this problem or is just my fire stick. I'm able to do this on my PS3 just fine. When I use YouTube in my living room I would cast it on my PS3 by hitting the cast button on the youtube app on my mobile device. When I got my FireStick I figure I could do the same. It shows up as an option, but when I do, it just hangs there and never connects. I thought it was just the way it communicated with my phone. I tried my tablet, 2 other phones I had laying around and no luck. My friends were over this weekend and they tried their phone with luck at all. I don't know if this is a common issue, I don't see why it would be an issue cause it works fine with my PS3 YouTube app.