A common question about the MOV video files that are produced from the Canon 600D/550D/Canon 7D/60D cameras is how to play them smoothly on a PC as they can be very choppy/jerky when played as the MOV format.
Even if you have a very high spec PC the playback can still be jerky and not smooth. The best way that I have found is to use some software called Cineform Neoscene. This will convert the MOV files which are highly compressed into a more usable AVI format that your PC can play more easily. You can get a free trial of the Neoscene software from the Cineform website and to purchase is around £70. This may seem a lot of money but remember that with this software you can then edit the video on your PC using Windows Movie Maker without having to purchase any further software and also without buying a new high spec PC.