This video illustrates what sometimes happened during jitter removal. Not a big deal, you just had to perform it again. Not really sure how and why it happened since it was not repeatable and occurred only a couple of times.

Other peculiar things that I noticed during the testing period:

When you do "File->Export Video" and it asks about the codec after filename was given, if you close the box at that point, the software starts making the video (without compression, I assume). Now, if that is cancelled by pause button, the resulting video file cannot be removed right away. Nor can I make another file with the same name (overwrite). The easiest thing is of course, to close the program and delete the file but I managed to do it also by changing the ROI and exporting something else to a video file that had different name and then went back to the original ROI to export what I was supposed to do in the first place.

In iPiRecorder, the camera number doesn't match the numbers in iPiStudio. It seems to me, that the leftmost camera on the screen will always equal #1 in iPiStudio. I was a little bit confused until I realized this. Doesn't really matter, but good to know.

At least for me, the limbs tend to go over their limits (or is there really a limit?) like here. The main problem is, that it is very hard to correct since even if you correct the hand position in one frame and track back as instructed, it starts very soon go wrong again.