This is a previously never released video taken off of a development CRT showing an MK3 level that was left on the cutting room floor.

It was an underground cavern level that we were doing initial testing on the graphic elements of.

While I wasn't employed by Bally/Midway/Williams, Ed asked me as a friend to do some graphics for a level.

Some surviving graphic work I contributed was the Galaxian style mini-game in MK3.

The quality of the video is meh and there is no audio but hey, it was the 90s. (The video on the right was SNL that we were apparently watching on a TV at the time.)
Mortal Kombat 3 - Never before released video of an unreleased level as a work-in-progress (OC) : r/retrogaming