Mp4 ?

Is there a nice person out there who can please inform how to view an MP4 file and which program to use ? :-)

[SalTheWop]

Try VLC .plays nearly everything. LINK

[hamish]

Definition here:
Apple - QuickTime - Technologies - MPEG-4

You didn't mention which OS you were using.

For Windoze or Mac:
Player here:
Apple - QuickTime

For Linux :
Totem plays almost anything