I think I read before that some of the still screenshots are probably mockups due to Mario's position not always matching up with the camera position in-game, but then again who knows if the camera system was adjusted from the proto to final.
There's a higher quality shot of the one screen in the video tho that's almost identical to the blurry, over-saturated version altho the numbers on the HUD are completely different.
https://tcrf.net/Prerelease:Super...
That might help to imply that those shots really are mockups. As far as playing the parabeetle level, I'm not sure I'm familiar with how to do that, altho TCRF does document a similar looking unused level but as far as I know doesn't include the parabeetles.