audio not coming through on share screen

[ygdobariya]

Hello, I'm working on videochat application. I faced issue like when i share screen & play video from youtube or other sources at time on other side audio is not coming. Please check my share screen function below. Any one have idea about this issue?

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sharescreen.addEventListener('click', () => {
        if (screenStream != null) {
            alert("You Screen Share alredy running.");
            return;
        }
        navigator.mediaDevices.getDisplayMedia({
            video: {
                cursor: "always"
            },
            audio: {
                echoCancellation: true,
                noiseSuppression: true
            }
        }).then((stream) => {
            screenStream = stream;
            socket.emit('share', myPeer.id, ROOM_ID);

            let videoTrack = screenStream.getVideoTracks()[0];
            let audiotrack = screenStream.getAudioTracks()[0];
            let micaudiotrack = myVideoStream.getAudioTracks()[0];

            videoTrack.onended = () => {
                stopSharingScreen(videoTrack);
            }

            console.log("stream here", videoTrack);
            pc.forEach(element => {
                let sender = element.peerConnection.getSenders().find(s => s.track && s.track.kind === videoTrack.kind);
                sender.replaceTrack(videoTrack);
            });

            screenStream.getVideoTracks()[0].addEventListener('ended', () => {
                stopSharingScreen(videoTrack);
            });
            broadcastNewTracks(stream, 'video', false);
        }).catch(function(err) {
            console.log(err.name + ": " + err.message);
        });
    });