"[YouTube and Vimeo are] ... still stuck in this broadcast-mode type of mentality where you post something and it’s there, and any sort of interactivity takes place in the form of a list"
River of the Net is a way to view short, tag-related videos without any sort of context. This interview explains things a little more. I've had some NWS content pop up (though not much), just as fair warning. [more inside]