I have started having problems viewing embedded videos in Safari.

Everything was fine on my iPad 3 until a few weeks ago when the embedded YouTube videos in the forum I visit (using Safari) stopped playing. I get the message...

Your browser does not currently recognise any of the video formats available.

Click here to visit our frequently asked questions about HTML 5 video.

...the thing is though that the videos will play if I open a new tab and go directly to YouTube (I don't use the app) and they will play if use the Atomic Web app to browse the interent.

I just want my Safari back to how it was, oh one more thing the videos play fine if I browse the same forum using Safari on my iPhone 4S.

Any real help will be very much appreciated, thanks in advance.