Nikosony,
Thanks for the reply. I think I've fixed it BUT not sure how it occurred.
I noticed that when you choose to EXPORT then go into SETTINGS, there was no video codec in the drop-down.
Tried a repair of prem pro, but that didn't fix it, so uninstalled it and re-installed it, THEN sure enuff the video codec was there and all started to work again.

Oops Mustava!