You can play at normal, double, 1.5, 1/2 or 1/4 speed.  No joke.  Check this link and see if it works for you.

But now that I’ve shared the link, the feature isn’t there anymore. WTF?  Ok, I’m doing a video screen capture while this is still up. This is a pretty cool feature and a VERY cool feature for those that like to dissect visual effects in film OR for all the animators who are studying animation. Dear Vimeo, take note.

*UPDATE*

The Speed option is back again. It’s probably because I was jumping between browsers. I don’t see it in Firefox, but I do see it in Chrome (Chromium). I really am digging this (obviously).  It seems that it’s an HTML5 feature that you have to opt in to.