Wonder if you could do this same test again that you showed in this video, but take a long screwdriver or something that allows you to push the oil pump driveshaft towards the front of the motor and see if it rubs on the counterweight as the motor is being turned over.
https://www.youtube.com/watch?v=dDZKHIOGWcE
If this turns out to be the problem it may be the 2nd time this may have been seen as mgarblik noted he had something similar occur!