Unless the wire has snapped, which it obviously isn't in this case, everything will usually look OK with the window winding mechanism.
There are various bits that can be faulty relating to the window winding that aren't part of the regulator/winding mechanism, but it looks like they are working - eg the window drops when you open the door.
It looks like the CCU is having trouble knowing where the window is, or there are possibly voltage issues. I'm in the camp that this will be resolved by replacing the regulator.
As I say, its a fairly easy job to do, as a tip, I'd say lower the window (bit by bit if necessary!) to give you easier access/visibility to the bolts holding the glass. Also, once you have it installed, be prepared to loosen the glass and shift it sideways to adjust where it sits if necessary.