My uncle Norman Collins tried and tried to capture it on 16mm film and I think he said he finally succeeded one year.
It was discontinued in the 1960's because of the traffic etc. it generated from the locals in the Bay Area.
This is as close as it comes, watch the video too. Enjoy,

http://www.adamfrelin.com/works/Firefall-74/
History & more.http://yosemitefirefall.com/