||This specification extends MediaStreamTrack to provide a media-content hint attribute.
This optional hint permits MediaStreamTrack consumers such as PeerConnection (defined
in WebRTC) or MediaRecorder (defined in Mediastream Recording) to encode or process
track media with methods more appropriate to the type of content that is being consumed.
Adding a media-content hint provides a way for a web application to help track consumers
make more informed decision of what encoder parameters and processing algorithms to
use on the consumed content.