Did he have the line 'Bellshit, or what' in something?
We may never know the answer to these questions.
It could be someone else but his face springs to mind. He was mock host and said it instead of - true or false, you decide.
Sorry that was a quote from the video you asked about, and my attempt at humor in response to sad news. But you're right, he played the host of "BS or Not?" in the movie Amazon Women on the Moon: https://www.youtube.com/watch?v=N-9J2P4XZUo
The Amazon Women on the Moon segement was "Bullshit or Not?". The title was a takeoff on Ripley's "Believe it or Not", though the form of the parody directly copied the intro from In Search of....
Silva's ripping enunciation of "Bullshit...or Not!" was the funniest thing in the movie.