Hiya,
Need a little more information on this
When you say you burn a 'movie' is it a home made video? or a 'backup' of a commercial DVD? Are you creating a MPEG or MPG movie on the dvd disk? (or a DivX? or a .MOV)
Depending on what you are doing will determine what will and won't play rightaway on another computer or 'regular' DVD player.
for instance, if you make a video of your kiddies playing in the garden and want to send it to family in the US, you could first of all capture the moments on a camcorder. Then, import that into your PC and then use software to edit it. Then you can instruct the software to 'output' a file and choose various options (.mpeg or .mpg or DivX or .mov for instance) then the software will 'create' a file. You then take that file and burn it onto a DVD. Said disk will 'play' in another Computer - not a regular DVD player - say in Windows Media player or Nero etc. Depending on your software there may be an option to create a 'normal' DVD that can be played in a regular DVD player. By choosing that option you then get a disk that can be played in regular players AND on a computer with a DVD drive.
If you want to create a recording say of a commercial DVD to send then that's a whole different ball game. It can be done using specialist software (sometimes free!)but 'technically' you are breaching copyright laws - just be careful!!
There's quite alot more to this subject as there are so many file formats, different conversion techniques and playback options.
Some more info and I can tailor a more speciific response!
Cheers! Dennis! West London & Slough UK!