You can always modify the speed of an HTML5 player, like Vimeo's. Unfortunately, they don't expose the controls. Fortunately, you can modify it in JS by setti

You can always modify the speed of an HTML5 player, like Vimeo's. Unfortunately, they don't expose the controls. Fortunately, you can modify it in JS by setting the playbackRate property. Here're my two bookmarklets, that work on all non-iframe HTML5 video (alas, it doesn't work through an iframe boundary, because of the iframe security model). javascript:void%20function(){document.querySelector(%22video%22).playbackRate=1.7}(); javascript:void%20function(){document.querySelector(%22video%22).playbackRate=parseFloat(prompt(%22Set%20the%20playback%20rate%22))}();