Creating, organising and publishing findable media on the Web raises outstanding problems. While most applications that process multimedia assets make use of some form of metadata to describe the multimedia content, they are often based on diverse metadata standards. In the W3C Multimedia Semantics Incubator Group (XG), we have demonstrated, for various use cases, the added value of combining several of these into a single application. We have also shown how semantic Web technology can help in making these standards interoperable.