Can you guess why Bono said no?

Last summer, I posted a very funny video called "Haters" by
Isabel Fay, but it wasn't until months later that I had a look at some of her other films, mostly while I was avoiding things I ought to have been doing. (I do that a lot.) I'd like to show you two gems.

The first is the story about how Isabel and her director Lee York entered a film into the LA Comedy Shorts Festival, then remembered they didn't have clearance to use the soundtrack, a choral version of U2's "With or Without You". After trying and failing to get permission, they came up with a very clever way to show their film without getting hauled into court:

Now, at the close of this video, Isabel tells us that they still couldn't actually show their film because U2 was still refusing to give them clearance. Evidently, they eventually got permission; the original award-winning short is now up at Isabel's channel at YouTube.

When I watched it, I thought I could guess why Bono initially said "no". Why don't you watch it and do some guessing yourself?

I enjoyed this immensely, by the way, yet, unlike several YouTube commenters, I felt some sympathy for U2 as well, although I admit I have never heard their reasons.