An interactive video of the Chelyabinsk asteroid event
asteroidday.org
asteroidday.org
The constant hissing is extremely annoying, in Chrome the video time bar only works in the upper few pixels (which i discovered only by accident), the skips from perspective to perspective come very surprising and it is unclear whether they skip to indoors views because they think it's more impressive, or because all the outdoor cameras dropped dead before the impact.
The only interesting information i got from that page is that the impact apparently happened at ~68000 km/h.
Umm .. if ever there were a case for breakaway civilizations digging big, deep holes, and moving a bit of the species there, this statement would be it.