Simple question on PS2

I plan to buy PS2 for my son and want to watch DVD.
(BAre you satify with DVD play back on PS2 ? I mean image and sound quality.
(BCan my son play with oversea kids who are also online network ? only limited
(Bto same country ?
(BWhat can I do with IEEE1394 and usb socket ? connect digital camcorder and
(Bcamera ?
(BPlaying game on monitor or TV. Which is better ?
(B
(BThxs.