I made several DVD's in MovieFactory from MPEG2's that I created in Vegas Video.
Everything works well, except I have had a few customers report that when they play the DVD in a high end DVD with optical audio cable, that there is no audio. When they switch to the RCA audio, there is sound.
You might want to search for a compatibility test article last fall at DV.com as well as checking out their DVD forum. Depending on the type of DVD burner & the brand of media, can have problems playing on various eqipment.