Flickr has added the option to upload short video clips.  They've got some major differences from other video sites and appear to be treating the videos mostly as a way to complement your photos for the time being. 

The goal is not to have people upload long videos or clips of copyrighted material. To reinforce that, videos can be only 90 seconds in length and 150MB in size.

A Flickr group has been set-up to showcase some of the videos being uploaded.

Here's a sample (and no, that's not him farting at the 15 second mark!)...