The walking dead and infinity blade 2 no longer working in full screen, all of the sudden. Already tried restore, not working, what should I do?

It happened after seeing a video on vidto.

I noticed something odd while playing infinity blade 2 and then I recognized it was actually smaller, with two black bands in the lower and upper part of the screen. I checked The walking dead, same situation. All fine with Wild Blood.

Scorned by this fact, I restored the settings, without effect, then I tried restoring settings and data, reloading a backup made 2 days ago.

the walking dead still shows 2 black bands in lower and upper part of the screen, I can't check infinity blade 2 right now since I am using a limited data Internet connection.

Please help!

(Using an ipad4)