 priority and
DSCP marking for packets that will help provide QoS in some networking
environments. The priority setting can be used to indicate the relative
priority of various flows. The priority API allows the JavaScript
applications to tell the browser whether a particular media flow is high,
medium, low or of very low importance to the application by setting the
<code>priority</code> property of
<code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webrtc-pc/#dom-rtcrtpencodingparameters