“The poet Daisy Aldan (who brought Gerard Malanga into the world of experimental filmmaking) directed a beautifully evocative and impressionistic documentary, Once Upon an El, in 8mm color with a 7 1/2 ips tape soundtrack. The 15-minute film’s cast included John Ashberry, James Broughton, Chester Kallman, Frank O’Hara, Olga Petroff, Kermit Sheets, and other luminaries of the Av...