Versatile Supplemental Enhancement Information (VSEI) is a companion standard to Versatile Video Coding (VVC). VSEI defines SEI messages that contain metadata inserted into a bitstream synchronized with the coded video, to convey extra information intended to be utilized by the receiver/decoder. SEI messages are optional and are targeted at specific use cases. SEI messages specified in VSEI may also be used with other video coding standards, including H.264/AVC, HEVC, or future standards. Since the initial standardization of VVC and VSEI in 2020, second and third editions of VSEI have been standardized, with a fourth edition under development. The new SEI messages included in new versions of VSEI bring even more versatility to VVC, by addressing a broader variety of applications. This talk will describe several of the new SEI messages and the use cases they enable. This talk was presented at Demuxed 2024, a conference by and for engineers working in video. Every year we host a conference with lots of great new talks like this in San Francisco. Learn more at https://demuxed.com