My 5 I am trying to watch my 5 app and it just goes black

[catdot]

I tried to play the second episode of under the dome but the screen just ges black 

[Stephen+Mourton]

@catdot   Have you tried an app refresh. If not go to Settings and chose System management and press on App refresh.  It does take a few minutes.  Also afterward go back into System management and chose Restart.  I hope that helps