Definately sounds like your player either doesn't especially like the disks you are using, your burner doesn't much like them, and/or you are using poor quality blanks. So, to echo what was said above; sounds like a media problem.
Especially for dvd video it's important to use high quality media. With cheap stuff you're more likely to have larger quality variations even within a single spindle.
Tell us what make and model of burner you're using and what type and brand of disks, see if that can shed any light on things.
EDIT: that is if the problem is indeed with burned disks and they are your own burns. More information is always better if you want a meaningful reply.
Any way you can try your disks on another player, and do they play ok on your PC?