Whoa, this is amazing! I really like how the browser decides which subsequent chunk of the video to load next depending on the bandwidth available. The video played super smoothly on my super crappy internet connection (I live in a developing country), which is impressive.
It's also interesting how in chrome "right-click > save video as..." is disabled, but I guess that's to be expecting considering how this works.
Sucks how Safari on iOS doesn't support it though, although HLS seems easy enough to implement.