Anything larger than 720 x 576 is going to be high definition. DVD players cannot playback high def video. You would need a blu ray player that can use avi files.
Or you can just convert it to dvd video using AVStoDVD. This will reduce the resolution and let you play it on a regular dvd player. Just make sure to set the output in AVStoDVD to match your country’s dvd standard—720 x 576 is PAL, 720 x 480 would be NTSC used in the US.
AVStoDVD is free to use and can be downloaded here: http://www.videohelp.com/tools/AVStoDVD