HTML Video Rollover expand, is it a success?

HTML Rollover expand has relieved a lot of users. But, has it really made it so easy for everyone? This embedded video player has made it possible for the HTML 5 supported video to be played in the browser that support the plugin, and returns to the flash player where it isn't supported? Different browsers support different video formats, so the web developers who post video need to post it in different formats so that HTML 5 capable browsers (Firefox, Safari, Chrome) can all play the video. So, has HTML Video Rollover expand made life easier?
