If you're showing it in a public place, remember that you're either going to have to find the rights to it or find an artist who will let you use it.
On the contrary, the usage that Ian describes is likely to be acceptable so long as it's okayed by the theater manager. I am far from being a legal expert, but this application seems quite defensible under fair use. Also, practically speaking, even if something is illegal it doesn't matter unless someone decides to charge someone with something, and it seems vanishingly unlikely that such a thing would occur.
Also, one minute is a really freaking long time for a response and a kiss. And any bets as to whether they're going to actually feel like sitting down and watching a movie afterwards?