The .M2T format is a high-definition file, more commonly known as "HDV". These files are created by various high-definition video camcorders. The format was originally developed by JVC and swiftly supported by Sony, Canon and Sharp camcorders, using MiniDV/DVC cassettes. This file type uses MPEG-2 compression and allows for resolutions of 720p and 1080i. HDV is backwards compatible with DV.