Media Checker is an app that can open a Vegas project file and extract media file location information WITHOUT having to open Vegas.  As such, it is comparatively very quick. It can determine if each media file is: OK-Found in filepath location; Missing: Cannot be found; In Proj Dir: Found in project folder; In Proj SubDir: Found in project sub-folder; or In >1 Dir: Found in more than one folder.  Of note, there is an option to also include all project media from any nested child projects.  It can be used to extract information from all versions of Vegas Pro and Vegas Movie Studio.