A little background from the YouTube files:

Directed in 1971 by Robert Alan Weiss for the Department of Chemistry of Stanford University and imprinted with the “free love” aura of the period, this short film continues to be shown in biology class today. It has since spawn a series of similar funny attempts at vulgarizing protein synthesis. Narrated by Paul Berg, 1980 Nobel prize for Chemistry.

(See also: http://www.johnkyrk.com/ | Cell Biology Animation)
(See also: http://www.johnkyrk.com/evolution.html | Evolution)