I need to tell, whether video cannot be played (\"x\" sign is shown in browser).
This code does\'t works. \"onerror\" event will never be fired under Firefox
"onerror" is not a valid event type for
Use "error" instead.
document.getElementsByTagName('video')[0].addEventListener('error', function(event) { ... }, true);
For a complete list of events for go here: https://developer.mozilla.org/En/Using_audio_and_video_in_Firefox