Is this considered fair use?

Incidental copying of music playing in public is not necessarily a copyright infringement. If you INTENTIONALLY film your subject timed to coincide with a musical performance, or talk about them music, that's different.

On the other hand, under US copyright laws, any recording of a live public performance of any music requires a license from the performers. 17 USC § 1101.

Copyright holders need to give permission for public performances of their work.

You should contact the event organizers and ask them what permission they had to be using this music in the first place.

If your "distribution" is just to one or two friends, you're not likely to have a problem. If you're "distributing" it to everyone at the event, it may appear on the web, etc., you're going to have copyright infringement problems.

And no, it has nothing to do with "fair use." There's no potential "fair use" here.

I'd contact the event organizers and ask about their use of this music. Don't be surprised if they did not have proper permission, in which case you distributing video of the event is just going to get you in hot water.

Don't post it online.

You already asked this once. If you stand to make money from it, then it is not Fair Use. Fair use, is best described as a movie review on tv. The critic comes on said what he or she thinks and rolls a "borrowed" clip of the film for only a few seconds and he's done.

Fair use has to be fair, you cannot play one full minute of someone's else's copyright work and use it without permission. It's stealing.