DVD vs DVD-R: What's the Difference?
DVD-R disks are not the standard video DVDs that you rent at the neighborhood video store. These are recordable DVDs that are made via a personal computer. Most newer DVD players can play these. However, older DVD players may have a problem. If you have a reasonably new PC with a built-in DVD player, DVD-R should play OK on your monitor screen ... or through the PC and onto a TV if you have that capability. If you're confused or unsure about DVD-R capabilities, check the manuals that came with your PC or DVD player ... or find the website of the manufacturer of your PC or DVD player and check there.
Listings of standard DVD players that are compatible or incompatible with DVD-R disks can be found at www.vcdhelp.com/dvdplayers.php