Canon EOS 5D Mark III Instruction Manual page 260

k Enjoying Movies
Playback and Editing with a Personal Computer
To have the movie play back smoothly on a personal computer, use a

high-performance personal computer. Regarding the computer hardware
requirements for ImageBrowser EX, refer to the PDF file ImageBrowser
EX User Guide.
If you want to use commercially-available software to play back or edit

the movies, be sure it is compatible with MOV files. For details on
commercially-available software, contact the software maker.
260
The movie files recorded on the card can
be transferred to a personal computer
and played with ImageBrowser EX.
(p.390)