Proof of concept that loads a video file and uses WebCodecs to convert it to a MediaStream where it can be set as a VideoElement srcObject or sent to a WebRTC RTCPeerConnection

Notes:

• mp4box.js is used for demuxing.
• Doesn't include a buffer management system to keep audio & video in sync
• Only works if the source file contains a single audio and video track

See webrtcHacks for more details and commentary.

Heavily inspired by the W3C WebCodecs work and their Audio and Video Player sample. Video "Big Buck Bunny" by Blender Foundation, used under CC BY 3.0.