I wish I could tell you the Playboy Jazz vid will surface, I have no way of knowing. Nor have I seen or heard about Jaco playing sax on a recording, aside from the one you mentioned.
Jaco played the Hammond setting on the keyboard on WOM.
Please let me know if you ever run across any of those vids you're looking for.
Ingrid, There's an English contemporary arts programme called The South Bank show thats been on TV for as long as I can remember.
They dedicated a whole show to WR back in 1983. I saw a short clip of this recently on either YouTube, Daily Motion or something similar.
Although Victor Bailey was in the band by then, they obviously referenced Jaco and there was a short clip of Jaco with WR at that Playboy jazz fest gig. That's my proof for knowing it exists I just hope that someone with the power let's us see it!!
