DVD’s are all very standard in what is allowed/able to be played. Any DVD that you can buy at the store and burn onto is gonna want a 16:9 aspect ratio, but whatever encoder your using will probably letterbox it for you anyways. It’s also mandatory that the video is a mpeg2 codec in standard definition, meaning 480p Widescreen. Also when using DVD presets in adobe encoders your video and audio will come out as two separate files.
Because dvd’s demand this mpeg codec, which isn’t the best, you want to make sure that you haven’t already compressed your footage before rendering to dvd. That’s really as much as you can do.