Moth3r's right. There are duplicate frames -- many of them. Some of them are close together: 20 and 21, and 24 and 25, for example. The duplicate seems somehow heavier (blurrier?) than its predecessor, which might explain the shimmering that you see.

The method I posted was just the one I usually try as a first attempt. I have been trying to see if there is a pattern, but so far I cannot work it out. Really, HDTV broadcasts can be a pain, which is why I suggested videohelp: the guys there are far better at working these things out than I am.