I looked up IMDB because I'm pretty sure he appeared in a fairly old film performing on stage as part of the scene setting, something like, but not necessarily, "Holiday Camp" but couldn't find one listed.
The IMDB listings for him are pretty sparse but that's not surprising considering he used to appear mainly in variety.
I would guess that videoclips from the time when he was regularly "on the box" are hard-to-come-by. I wish you luck!