IPhone connected to AirPlay but no Apple TV?

My iPhone 6 is connected to AirPlay, and whenever I try to watch a video on my camera roll it says "Airplay; This video is playing on Apple TV." I don't have an Apple TV. We did very recently install Foxtel Go which connects to the Wi-Fi, but it even happened at someone else's house where I didn't have any Wi-Fi. I've tried turning off Wi-Fi, turning off bluetooth, anything I can think of. This never happened before we got the TV installed. I want to be able to watch videos.

Added (1). Update: I even tried turning off bluetooth. I can still hear the audio but can't see the video.

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