In order to find out what other programs you have (or for us to guess) and which one is suitable - please tell us what op sys (XP, VISTA, W7) you have. Also tell us what the file ext is of DVD. (TS, AVI, WMV, MOV etc)
Do you know what other players you have on your pc? Windows Media Player, VLC etc. and also any other Video editing software you have installed.