You've posted rather a "mixed bag" of a question. You're asking about movies, playing them on a DVD player, and writing to CD-R, rather than DVD-R discs. You also say these are from your Digital Camera, instead of from a Video Recorder. So, I have to start by asking if what you said is what you meant, or did you mean Video Recorder and DVD-R disc instead?
If you really mean from your Digital Camera, then the next question is, what format does your camera create/store those videos in? My Kodak creates QuickTime .MOV files. I believe Video Impressions (part of the ECDC 5 Platinum Suite) is supposed to let you import .MOV files on the way to creating a VCD, however, that's not a DVD, and some DVD players do, and some don't, support VCDs.
The next thing to say is that ECDC 5 doesn't support writing Video DVDs, only data DVDs. It's possible, if you were to put your video file onto a Data CD or DVD, that your player might play it, but that's going to be strictly a function of what your DVD player supports. And I wouldn't bet on it supporting that sort of playback.
So, give us some clarification of just what equipment you're using, what files you're getting, and what you want to write them to.