It allows you to edit and search the metadata that can be stored in QuickTime movies (mov files), including chapters. Quicktime files support a large number of metadata options, but the QuickTime Player doesn't provide an easy way of accessing them. Metadata Hootenanny does. Why Would I Ever Want To Have Metadata in My Movies? If you find that you have lots and lots of movie files and you want to keep track of which one is which, metadata is for you. For example, if you just watched a great TV show on your iPhone, and you want to find some more shows in your collection by the same writer or director, metadata is for you.