I found this one in the Museum of Broadcasting archives in New York City while trying (unsuccessfully) to find Kerouac's appearances on the Steve Allen and William F. Buckley shows. This is a short film shown as part of some experimental package; I don't remember the exact context but it was some Channel 13 kind of thing.
Ralph Bakshi is a favorite director of mine (he did 'Fritz The Cat' and 'American Pop'), so I was pretty excited to find this, especially because it was about an aging Beat-wannabe and included actors playing Kerouac and Neal Cassady. I checked out the videotape and watched it on the little museum monitor (which is what you do at the MOB). I liked it. Harvey Keitel plays a morose, lonely old hipster whose life hasn't developed into much of anything since the age of Kerouac. There's not much story beyond that; nor does there need to be. We see an actor (who actually doesn't look much like Kerouac, but dresses in Kerouac-style flannel shirts) simulating a Kerouac poetry reading in a nightclub. There's one very affecting shot of Neal Cassady: Keitel says something about the death of Kerouac's 'Denver friend,' and we see Cassady falling to his knees on that legendary train yard, yelling "This Ain't Bebop!" Which is, I suppose, the message of this film.