Do you have the option to Save_As/Export as MOV with either the Animation, or PNG CODEC? Either of those should work fine on either a Mac, or PC (with the proper CODEC's installed).
MP4's are heavily compressed, and when one does a Save_As/Export to MP4, the video will be re-compressed.
Thanks a lot for the suggestions, they were indeed helpfull. I saved the file as a Quick Time Movie and the copy looks identical (or almost identical) to the orignal file.
One other question. Should the layers pallet show each frame of the video? When I load the video file it just one layer in the layers pallet.
Note On Saving:
I can do the following.
Quick Time Movie