This video has been edited and re-encoded with Avidemux. I've deleted every 8.25th frame because the camera seems to copy this frame instead of shooting a new single picture. Therefore all videos of the NV100HD look somehow jerkily/stutteringly.

Original jerky video: vimeo.com/1839118

Edit:
When I use an faster SDHC card (class 6) instead of an usual SD card only every 9.25th frame is double. But the videos still look jerkily.

I've reported this problem to Samsung's support. I am anxious to their reaction.

Edit2:
The proof that the jerking/stuttering of the HD videos is a camera interior problem is this 640x480 video which isn't jerking: vimeo.com/2627014

Samsung has not yet reacted to this problem. Therefore I cannot recommend this camera for users who want to film any type of movements in 720p!