And you're still not getting any joy, then it may be worth getting in touch with the app developers directly to check into things at their end.
Say "Hello!" to the Community in The Introduce Yourself Thread.
It's official. As far as I tested it, the Dailymotion app on my Tv is now working fine. I didn't do anything. I just waited. Is it working now because of a TV update? Or because of the app own update? I don't know.