VIDEOS:

16mm Steenbeck Desk Fault: Random jumping or stuttering of the film transport with an audible "clonk" noise. It happens regardless of whether the machine is actually running or not. This problem makes lifting audio from the machine impossible since the slight jump comes out on the audio.  Anyone have experience with these machines?

BVH-3100 Tape Transport Issue:
On rewind with anything over 2x speed, tape spills and the machine shuts off with alarm.

EDIT: the fault turned out to be a seized pinch roller mechanism, some contact cleaner/oil, got it moving again!