AFAIK,....downloaded movie and video files are neither. It will be important if you plan to burn them to CD/DVD. If you have the NTSC system then you'll have to convert the file into the NTSC system. I have WinAvi converter and it offeres me to choose between PAL and NTSC, only Seacam (used in France) it doesn't offer.
But maybe others here can fill in the gaps.....
