What is the MPG format
MPG is a very common extension for MPEG video files and is often found in digital videos, discs, exports from older software or files that have been stored for a long time. Although it is closely related to MPEG, many users mainly recognize it by its file extension.
Converting MPG to MP4 is often a good idea when easier playback and broader compatibility are needed. The change makes the file simpler to use in browsers, phones, TVs, publishing platforms and modern players.