Maybe it would be good if Wasmachinemann-NL had someone close enough who also bought a Pro1 (or has an E7 which may be much easier to find) and compare them just because I think it can be a normal behaviour and also may be an abnormal behaviour which can not be really seen in the video.

As of my N900 units, they can be rotated a bit when not fully open / closed state and a little bit in opened state but that is normal - however, their mechanics are absolutely different.