Chris,
Didn't realize these had been used in this service. I assumed (incorrectly) these had been restricted to use as "yard goats".
The exhaust smoke isn't that unusual for these. I'm not sure which of several options that GE used for governors on these, but turbo lag is obviously a problem and the compensating system isn't quite working as intended. Don't let Kalifornians see this or they will accuse you of causing global warming.
A surprising number of these were and still are used in commuter and passenger service.
Thanks for the video,
Dan