Hi anyone know why the videos I play from my phone stopped playing full screen after originally working fine?

There all 16/9 resolution and the full screen button in the video screen does nothing

I haven't updated anything they just shrank one day and never went back to full screen

If you're talking about the appradio displaying ever so slightly shrunken video and general apps you're talking about the iphone/appradio glitching when it comes to handling overscan. Apple has a setting to turn this off for the apple tv but they have no such setting on the iphone. 

I've noticed most "official" appradio app videos are full screen on the AR3 while some of the mirrored non supported apps are shrunken down.  I have a Slingbox and the iOS SlingPlayer app isn't full screen for some reason.   This particular app has the controls on the iphone while video is displayed externally.   So it's nice that the remote is split to the iPhone and video is seperate on the AR, it's a shame that it's not FULL screen.   I can pick stretch to get the video full height but the sides are still black bars even though it's an HD 16:9 video

As mentioned in the AppEx FAQ: All non supported apps have the black bars on either side and at this point its a design feature.

Thanks Danny that explains it, yeah guys I'm talking about videos only, not apps, videos I've encoded and play thru the iPod in headunit, seem to remember reading about the issue before it happened to me