Tubi has "Van Dyke and Company" Season 1 episode 8 featuring Freddie in 1976. I couldn't link Tubi to this page, but I found and watched it with no problem. Freddie performs in a wordless pantomime about selling a large turkey (VanDyke) to customers, A boxing match with George Foreman and a spoof of "Blazing Saddles." Dick Van Dyke told the audience that Prince "is a nice, extremely talented young man." Who would've guessed that Dick would outlive him?

It's funny that in the boxing match sketch, he's being referred to as Chico Rodriguez.

Yes, that's because they were trying to promote the show.
Freddie didnt look very happy during that sketch, though.

In the episode, Dick Van Dyke introduces Andy Kaufman, but Freddie Prinze comes out instead and starts doing an imitation of the foreign man character. It's weird to hear him do because even though Andy had that character before Taxi, I associate it with that show and of course, Latka Gravas. Freddie would be dead before Taxi debuted, so to hear him do an impression of Latka is not something I ever thought I'd see.