Vimeo Video plays fine in Safari (after being used in a revolution slider)but not Chrome or FF

http://htw.promoting-u.co.uk/htw/

Hi, Vimeo Video plays fine in Safari (after being used in a revolution slider) but not Chrome or Firefox browsers? It seems to loose quality when the play button is clicked in Chrome & FF. Also I set the video to autoplay in Revolution slider but it won't? The video is inserted by just dropping the Vimeo video ID into the slider settings so it must be something in the plugin and not vimeo. I had it autoplaying to begin with but now has stopped. Cant see why?

Any ideas would help me to solving this.

Many thanks.