dvd's in black & white

[nalla111]

i tried gspot but im a little pissed and couldnt understand but basically ive got some backed up films which all play in colour on my dvd player but a small few of them play in black & white in a friends but not many at all and also in a ps2 but not many at all at first i thought it was the ntsc ones that played in b/w but now some of them do play in colour and some dont