One of the problems that users often encounter is that a DVD-Video disc will not play in a stand-alone player. Often, these will play in a multi-drive on a computer, through a software player. What is the reason?
Well first, that disc is not really a DVD-Video, per se, but is a DVD-ROM, as it was burned, and not stamped from a glass master in a replication house. All DVD players are certified to play any replicated DVD, regardless of whether it is a DVD-5, or a DVD-9. None are certified to play any burned DVD, regardless of type (+R or -R), or any configuration, DVD-5 or DVD-9. Most will, given certain criteria, but some just will not.
The best that one can do is to use top-quality blank DVD media. This is the biggest cause of issues with playability in set-top players. The issues can be hangs, skips, dropping of Audio or Video or plain failure to play. Verbatim, Falcon Pro, or Taiyo Yuden are about as good as it gets. Brands, such as Memorex, TDK, recent Ritek and any store brands are to be avoided. Most will use the cheapest possible media and just rebrand those to their logo. A spindle of 100 might have blank discs from 4 different mfgrs.
Another consideration is to use a slower burn speed, rather than the fastest possible. One limit with PrE is that it will take an average of the speed of the media and the burner, and choose the fastest possible burn speed. The best that one can do is to buy the slowest media possible, say a 4x, rather than 16x media. A workaround is to Burn to Folder, and then use a burning utility, like the free ImgBurn, and then choose a speed in the middle/lower-middle of the range. ImgBurn will also tell you who the mfgr. was for your blank media, and the lot number.
The Burn to Folder is a good way to test a Project, as you would then do a test with a DVD software player, checking for errors. A second approach is to use a DVD RW disc (for testing ONLY and NOT for delivery), and test in several set-top players. One 10-pack should last for years.
Last, in years past, the type of blank media, +R or -R made a bigger difference. Most newer set-top players are much more lenient regarding type, but older ones still can pose problems, if the other type is used. Most BD players will handle either just fine, when playing a DVD.