Camera makers do not want people to manually add files to a memory card.
They have several safeguards; one is to prevent the camera from playing or showing such files.
By adding files to the Zi8 memory card you can end up with a card that the Zi8 refuses to use at all.
You will need some type of multimedia player, such as iPod or similar device, to accomplish your goal.
I have a Kodak Zi8 -- I'm attempting to load my P90X work out routines on to it so that I can HDMI it to my television. The videos were originally MP4's and I converted them to .MOV's -- loaded it onto the Zi8 and nothing happened, so I thought, well maybe it has to be named like the other files in the folder to be viewed. so I changed monday.mov to 129_0190.mov the result this time was an red-encircled black exclamation point. So the camera is SEEING the video, but it will not play it. I have the latest firmware, just did that this morning of the Kodak website. Perhaps my problem is the SORT of mov file I converted it to, which was/is: Quick Time (.mov) - HD Quality 480p (H.264, 848*480; MP2/4 (AAC) 320 kbps)
As far as I'm concerned an MOV is an MOV and the player should accept it ... please help me out, this is kind of important to my New Year's resolution