The end result is a confusing mess where you can get one MP4 file to play on your computer, but not another – simply because they’ve been created using different codecs. Video’s a funny old thing: it’s not enough there’s no single standard for video playback, the situation is complicated by the fact video is effectively split into two parts: the “container” the file is placed in, identifiable by its three-letter file extensions like MOV, WMV or VOB, plus the “codecs” used to render the video.
