I took a look at two of the (grey market) Star Trek Blooper VHS tapes I had in storage here at my place.
This tape (Video Dimensions 1978) has 3 reels:
Reel #1 First half of first season (Dark in places but better sharpness and color then the YOHO tape)
Reel #2 Second half of first season (Includes Happy Birthday segment)
Reel #3 Second Season (Better focus then the YOHO, NOTE: Missing Eddy Milkis joke and small part of the main titles segment before Shatner’s credit)
This tape (YOHO VIDEO 1997) has 2 reels:
Reel #1 First half of first season (Dark, blurry, film runs same speed as Dimensions version)
Reel #3 Second Season (Dark, blurry, Includes Eddy Milkis joke and full titles segment, film runs slower then the Dimensions version)
Each tape seems to have a separate dubbing master source that is derived from the same original 16mm prints of the bloopers. For basic quality, Video Dimensions is the winner between these two titles. But because of that small missing part of the titles sequence in the second season reel on the Dimensions tape, you still need the YOHO for completeness. You could just edit the missing bit from the YOHO video into the Dimensions’ one.
“First feel fear, then get angry. Then go with your life into the fight.” - Bill Mollison