There have been posts here and in the Sanyo forum about people having trouble editing movies with various file formats.
As an experiment, I just made up a little movie containing both video clips and stills from three hybrids. Plain MPEG4 .avi clips from my Samsung i6, H.264 .avi clips from the new Digilife DDV-730, and .mp4 clips from the Sanyo CG-65. They also have variations in the audio coding.
I was using Cyberlink Power Director v.5. While this program has all sorts of crashing problems if you have any other video editing software on your pc, and it is far from the latest version, I have to give it credit for accepting these three formats, allowing me to tweak the brightness on some of them, and rendering a movie which, so far as I can see, lost no quality on any of the clips. I'm impressed.