Cheech & Chong and Return of the Jedi: 1984 Oscars
https://www.youtube.com/watch?v=cz7_UiE_VyU - from the official Oscars YouTube channel (4 mins long)
The blurb:
“Cheech Marin and Tommy Chong present a Special Achievement Award to Richard Edlund, Dennis Muren, Ken Ralston and Phil Tippett for the Visual Effects of Return of the Jedi at the 56th Academy Awards. Hosted by Johnny Carson.”