when i import some files i get this error. all the files are .mov, i don't know what a "MooV" is. just to give an example of a file name that did this, LTLEK4_.MOV. what does this mean cuz it does it to some files and not to others.
Indeed this sounds like the streams or headers are damaged. If they open in QT player, they may be fixed be re-exporting them with identical compression settings. Otherwise try the tools and procedures already suggested.