Being "drawn" to something is not the same as finding it useful or helpful. Certainly having the video as background is "captivating", but that means the foreground is basically useless: it's difficult to see, difficult to pay attention to, and difficult to use. The background gives you an idea of what the band is all about, and let's you watch them. But if that's the point, why have the foreground at all? Just show a video.

> Example: What if it were lots of smaller screens running the top TED shows, like what they do but more video than static.

Sure, if the point of the TED site was to make people feel vaguely happy about TED. But when I go to the TED site, it's to watch a video so that I can understand the ideas the speaker is presenting, not to get my senses filled with some kind of aesthetic vibe of TED-ness. For me, at least, your suggestion would be highly counterproductive.