Though, if I were to critique it, I would say that the JS was not really necessary for such a simple case for video. There's only one <source> (I guess H.264 is

Though, if I were to critique it, I would say that the JS was not really necessary for such a simple case for video. There's only one <source> (I guess H.264 is considered ubiquitous now) and the big central play button just gets in the way of the video (and on most platforms, the default styling of the <video> element puts a big play button over top of it anyway).