In The US, the NTSC television system is used. In many parts of the world, PAL is used.
Granted, if he used it only on a computer, it wouldn't matter too much as far as matching the proper frame rate/grid flicker (Hz's).
But also consider you want to buy the correct voltage camcorder for the given area. In other words, a camcorder purchased in the US may not work wherever he is, although you can buy PAL camcorders in the US, for example at BHphotovideo.com.