The actual entries in the UCLA catalog are a bit more revealing than that link. The WML? episode is apparently a restored kinescope, but the IGAS episode is a bit more interesting. The original holding is a 2 inch tape, converted to Betacam SP at CBS Television City, then dubbed down to VHS for a viewing copy at UCLA.
Also, the Password episode mentioned, with guests Betty White and James Shigeta, is apparently in black and white.