Jon, How do you save the data in an MOV file container?
The "Save As..." option in QT 7 Pro/QT X will copy the current data to an MOV file container. (MPEG Streamclip also has a "Save As..." option but additionally offers the user the option to use an MOV, MP4, or AVI file container if the compressed data allows such a container. I.e., using an MP4 container, for instance, may strip certain tracks from the resultant file.) In any case, I previously mentioned this when I thought the OP was trying to import an AVI file to iTunes. iTunes does not like the AVI file container and will baulk when trying to import an AVI file even if the data is properly compressed for iTunes/mobile device use. If you are actually transcoding the AVI data using the share or export option, then you don't have to worry about the files being in an AVI container since the export options will normally place the newly compressed data in an iTunes compatible file container.