One of the funniest documentaries I have ever seen, Off the Charts: The Song-Poem Cycle, is not available in its entirety on youtube.
In the back of magazines like Writer's Digest, songwriters advertise that, for a fee, they will turn your poem into a song.
The poems, the songs, and the people themselves are too complexly weird to be described--they must be experienced.
It's less than an hour long, and will stick with you longer than most movies you've seen. Trust me.
Find the film here.