Data reference
A data reference to a QuickTime movie, or to a stream or file that QuickTime can play.
Overview
If the reference type is 'alis' this field contains the contents of an AliasHandle. If the reference type is 'url ' this field contains a NULL-terminated string that can be interpreted as a URL. The URL can be absolute or relative, and can specify any protocol that QuickTime supports, including http://, ftp://, rtsp://, file:///, and data:.