M2T (MPEG-2 Transport Stream) is a video file format mainly used in digital video broadcasts (DVBs) and Advanced Television Systems Committee (ATSC) standards. Initially, it was developed for satellite and terrestrial broadcasts. Today, it’s common in most HD camcorders, and the video is stored in DV and MiniDV tapes. It supports resolutions of up to 1080x720.
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M4A is a filename extension for AAC container format and is developed by Apple Inc. M4A music is bought on the iTunes Store and does not come with DRM protection. In terms of quality, M4A is better than MP3 because it is lossless but still compressed. This means that it occupies less storage space and doesn’t lose quality over time.
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