This is very early Bill Viola. Best known I think for his slow moving under water footage. Found some early work of his in the Banff Centre Archives too. For some reason the visual arts component of the Centre, along with the music program, has a long history of international involvement--the literary side not so much.
Here in a seminal moment of footage from 1976
A more expansive exploration of light and movement, 1977
A strange attempt to come to terms with Viola's work
Here's Silent Mountain, 2001