I wasn't able to look at the entire video as my internet connection is quite slow in the train, but from what I've seen it's probably a wrong setting at the robot. Either the C_DIS value doesn't allow any blending of motions, or the robot is running in single-step mode. But then it would also show up like that with other files. Try changing the C_DIS value in the KUKA|prc settings if the single-step issue does not occur with other robot files.
Regarding the red coloring, that should be fixed in the member version which is several months ahead of the free version. For now, I would recommend just setting the axis limit for A6 to -360 to 360. The next major KUKA|prc release that will hopefully enter testing at the end of November will much more reliably simulate also processes that go past 180 degrees, e.g. winding.
Regarding your 3D model I would recommend running the ReduceMesh command, as it seems like a very high-poly model, which will negatively impact KUKA|prc and Grasshopper performance.
Johannes @ Robots in Architecture