How to burn a .mp4 to DVD+R
There is a freeware software called Burn:


  Made your own movies and want to share them with family and friends? No problem. Burn can create a wide range of video discs. From VideoCD to DVD-Video discs. And DivX discs to fit more of your videos on a disc.


I use it all the time for burning mp4s to DVDs, the finished product will also work with DVD Players too.