How to see movie in Ubuntu?

Bangladesh
May 24, 2009 5:02am CST
I am new Ubuntu 8.10 user. I like it and i am so happy to used it. But I can't play any kind of video like .dat, .mpeg, .vob. Can anyone help me how to see this kind of file. I have no internet connection. I use internet in my mobile. Plz help me
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