[ubuntu] what to do with a .dvd file?

I finished making a slideshow movie for my son's school and export the project from openshot using the DVD profile. The ouput file I am getting is a .dvd file type, 38.7MB which seems small, and it seems like nothing knows what to do with it. Brasero couldn't open it, Devedo couldn't open it, Bombono couldn't open it, Mplayer couldn't play it, nothing. However if I export the same project to the YoutubeHD profile, I get a 2GB .mp4 which looks and works great. Problem is when I transcode the .mp4 to a dvd using bombono, the quality takes a big hit. Does anyone know how to properly make a playable dvd from a .dvd file? Or any other suggestions?