Have another look at ART TALK! – VBS.TV.
There is not much there in the art section, but Vice Magazine’s Web TV Channel is a good example of a website with “curated” video content that works.
They brought us the incredible documentary “Heavy Metal in Baghdad” and lots of other groovy things like Inside Afghanistan or Inside Sudan, guides to Sex and North Korea, Skateboards, comics and whatever else young people are into nowadays. Vice does attract a big young audience for real and they’re taking their audience serious.