Over the last three years, the International Image Interoperability Framework (IIIF) Community has been working to extend the IIIF APIs to support AV. The IIIF Presentation 3 API has been driven by the needs of collections who already use IIIF and wish to extend the same interoperability features to their audiovisual collections, as well as new use cases from the wider AV community. The AV Technical Specification Group within IIIF, of which Tom Crane is co-chair, has been gathering use cases, modelling complex AV archival material, building implementations and refining the model. The IIIF Presentation API version 3 is the result. This paper introduces the API, and shows how the integration of textual and other annotation content, so powerful for image-based media, now works for time-based media too. Examples of IIIF for AV in action will demonstrate the capabilities of IIIF for AV collections.