My windows 7 dvd player won't play videos

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try cleaning the laser lense
If you have a dirty lense it can still read cd because data is not as compressed on dvd, each byte of data takes up far less space on a dvd so the dirty lense might not pick it up whereas it might pick it up on a dvd

on system start up time press F8 key for no of times.you can see some option from that you can select repair and continue with options given

Hi

Try to download VLC-mediaplayer from:Videolan.org and try with this program. and/or:
i allways use Mediaplayer Classic http://mpc-hc.sourceforge.net/ this works really well for me
and plays ALL Media. also download and install FFDSHOW: http://www.free-codecs.com/download/ffdshow.htm (this is the codec for media files)

Good Luck

Download div x codec and also update your video drivers.

http://www.divx.com/en/software/divx-plus/codec-pack

Are you sure that your ROM can't play the disc or is it that you don't have a program to play the disc? To my knowledge Windows XP didn't come packaged with a DVD Decoder program; except for XP Media Center. There are some FreeWare programs out there that you can download, or you can pay for the program that decodes DVDs so that you can watch them. If your DVD isn't recognizing any type of DVD that you put into the ROM, then try playing a CD\DVD player cleaning disc in it. If that doesn't work, then you will probably have to get another DVD-ROM.

Drivers

i think your cd/dvd drvive's lence has problem, can u chk it in any other machie.

This will do it. Click here.

don't know u're cam, but usualy the camera haz to "close" the dvd sesion, so that the computer/dvd player .... to be able to play it ...

Ofecourse u can play the video on PC, using cd/dvd data recovery software, that accesses the data directly and not track based ... (that in the case that the dvd got damaged and the recorder can't finish it ...)