+1, or jack up one side and turn the wheel by hand..
Will this work then? Can do this tomorrow just to check?
Just take cam cover off and try to spin jacked up wheel?
Guess so. With it in gear yes?

Weird. Video sounds like only the starter is spinning and nothing else. You think it might be turning the crank which aint connected to the cambelt anymore (ie Cam gear aint turning)? Slipped the keyway off the lower pulley perhaps?
Good luck with this mate, I hope its something silly (ie cheap to fix).
Also good luck with the move!