A .MOV file is a movie video. You select video mode with the rotary Mode switch on top of your camera, which must have been accidently moved. See your Extended User Manual page 9 about it: http://resources.kodak.com/support/pdf/en/manuals/urg01118/Z981_xUG_GLB_en.pdf
.MOV is called a QuickTime file, which is an Apple format, but it is reasonably compatible, for example your Kodak camera makes .MOV video files. There are video converters that can convert them to other video formats.
I think you can play .MOV files in Windows Media Player. Some sources say you need to add a codex before Media Player can play .MOV, but here, Microsoft says Media Player 12 can play them: https://support.microsoft.com/en-us/help/316992/file-types-supported-by-windows-media-player
Here is another list of programs that should open and play MOV: https://fileinfo.com/extension/mov
(and there are also others, I use a Cyberlink PowerDirector video editor or the VLC player)