You can use WebRTC simply on WordPress. This WebRTC is SFU mode.
This plugin loading javascript from external site. (https://cdn.webrtc.ecl.ntt.com/skyway-latest.js)
Because it’s need to webrtc.
This plugin is not Skyway official.
This software includes the work that is distributed in the Apache License 2.0.
Te puedes descargar este plugin para utilizarlo en tu instalación autoalojada de WordPress.