Desktop File and Metadata Uploader to MySQL: OS Independent

I need an app that can work on a Mac and PC, e.g., JAVA, Flash, Adobe Air. The app is used to upload video files stored on the local machine to a MySQL database on the web. Ultimately, these videos are purchased and viewed on a website connected to the MySQL database. The video files also contain user added metadata. Process: 1) User Selects Directory containing files 2) Files display in app. User adds metadata about each file. E.g., Name, Title, Location. ***This metadata can also be read in from a database. The app must be able to pull in data from a database. 3) The user saves the record and submits the upload. 4) The user must know the progress of each file upload. If it fails, there must be a way to identify and restart. 5) Videos are approx. 10-20MB.