On the Road to WebRTC 1.0, Including VP8

I am excited to announce major improvements to WebRTC in Safari 12.1 on iOS 12.2 and macOS 10.14.4 betas, including VP8 video codec support, video simulcast support and Unified Plan SDP (Session Description Protocol) experimental support. It is as simple as doing the following:

To further improve WebRTC support for multi-party video conferencing, simulcast is now supported for both H.264 and VP8. Safari also comes with additional improvements, including better support of capture device selection, experimental support of the screen capture API, and deprecation of the WebRTC legacy API.

Source: webkit.org