That demo imposter video was not terribly high quality or frame rate to begin with, and it being re-captured via the stream probably further obscured any motion artifacts. There is some popping.
I created a higher quality video showing the frame transitions but the answerhub would not let me attach it. What I did in my test was add red emissive numbers to some of the frames so I could tell if all the frames were being used and none were being skipped. It was working correctly. I will try to get the video up somehow.