I couldn’t say if Gurian’sel is 8 or 16mm. The reel below is The Managerie two parts. The reel below should not be 35mm because one single episode would need 2 or 3 35mm reels, so the reel below should be 16mm. This would make the blooper reel above 8mm.
However it’s certainly not 35mm and, as you say, the 35mm are the best elements one could hope to get.
Maab