first off welcome to macscripter I’m glad you made it !
you can use quicktime to move files NO more than you can use the finder to make quicktime edits.
you may be able to save a copy to a new location or you will need to direct the finder to move the file or you can call a shell script to move the file.
in fact you can get the dimensions from the file info using the finder and you don’t need qucktime at all
move is a command from the Standard Suite. Almost every scriptable application contains the Standard Suite.
location doesn’t mean explicitly a location on disk, depending on the application it could be a paragraph, a calendar, a mailbox or another list of elements.
About the Dictionary, after entering “move” into the dictionary, the top window lists move as being part of the Standard Suite rather than the QuickTime Player suite. That lets you know that its not a Quick Time command.