I have Embedded three Youtube videos, they work perfectly in ALL BROWSERS except Firefox.
Tried clearing cache on server side, cleared cookies & cache locally, t
Check the parent element to see if a CSS3 transform is applied. Our videos quit working in FireFox 24-26 until we pulled the following code off of a parent wrapping element:
transform: translate3d(0,0,0);
In this specific case, the 3d transform was applied to make things look better in Chrome, (hence the (0,0,0), but if you do a search through your CSS for transform and find an entry, try pulling it. Or testing in FireBug first.