My iPod's been working fine since I got it. Just last night I decided to put six new videos on it. All from the same source, all of the same filetype (MP4).
Three of the videos are now on my iPod, no worries.
However, three of them come up with a message saying "[filename] was not copied to the iPod [iPod name] because it cannot be played on this iPod"
I then tried to convert the files to an mpeg-I and try again, same message. I could understand if the filetype wasn't supported but why would three go on and three wouldn't?
P.S. so far I've tried:
-Holding the 'menu' and middle button to reset the iPod and try again
-Restarting iTunes and trying again
-Restarting the computer and trying again
-Restoring the iPod to factory and trying again
(all to no avail)