[ubuntu] Creating a DVD for regular DVD players

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http://ubuntuforums.org – I made a short video for my brother and want to send it to him on a DVD for playback on a regular DVD player. I created it in DeVeDe and burned it to disc. It plays back in VLC on my laptop, but won't play in either of my DVD players. I'm concerned it won't play for him. I made sure that it was set to NTSC (live in the US). The disc in question is an 8x RW DVD+R. Does that make a difference? I know "back in the day" CD players wouldn't play back an RW disc, but I wasn't sure if that's the case with DVDs. Anyone have an idea why my disc might be failing? (Hardware)