Block youtube but allow specific channels?
Before I begin, I suspect the answer is "you can't" or "you might be able to, but it'll be flaky or inaccurate".
We have SchoolGuardian and there's a channel that the English staff would like students to access because it contains a lot of hard-to-obtain shakespeare performances. Unfortunately there's very little (from what I can see) to tie a video url to a channel.
The best I can think of is modifying the proxy so it allows any youtube page (+ associated .flvs) that mentions the (reasonably unlikely to be duplicated elsewhere) channel name, but blocks any page that doesn't have it.
Can anyone think of a more elegant way? Downloading 600-odd 20mins-1hr long videos is not an option.