如何访问已经发布在会议室中的视频，并将其显示在新的参与者屏幕上？

Question

我正在使用twilio的JavaScript SDK制作具有Django后端的视频聊天应用

当我使用Video.connect（）连接到会议室时，新参与者的视频将添加到现有参与者屏幕中，但是新参与者看不到现有参与者 如何向新参与者展示旧参与者视频？

这是我的剧本

    console.log('conectes')

    const Video = Twilio.Video;


    Video.connect(context.person_token, {
      name: context.room_name,
      audio: false,
      video: { width: 640 }
    }).then(room => {
      alert(`Successfully joined a Room: ${room}`);
      room.participants.forEach(participant=>{
        participant.tracks.forEach(publication => {
          if (publication.isSubscribed) {
            const track = publication.track;
            document.getElementById('remote-media-div').appendChild(track.attach());
          }
        });
      });

      room.on('participantConnected', participant => {
        alert(`A remote Participant connected: ${participant}`);
        alert('scripty')
        alert(`Participant "${participant.identity}" connected`);

        participant.tracks.forEach(publication => {
          if (publication.isSubscribed) {
            const track = publication.track;
            document.getElementById('remote-media-div').appendChild(track.attach());
          }
        });

        participant.on('trackSubscribed', track => {
          document.getElementById('remote-media-div').appendChild(track.attach());
        });



      });

    }, error => {
      alert(`Unable to connect to Room: ${error.message}`);
    });

    function toggleLocalVideo(){
      const local_video = document.getElementById('local_video');
      const localMediaContainer = document.getElementById('local-media');
      if (local_video.checked == true){
        Video.createLocalVideoTrack().then(track => {
          localMediaContainer.appendChild(track.attach());
        });
      } else {    
        while(localMediaContainer.hasChildNodes){
          localMediaContainer.removeChild(localMediaContainer.firstChild);
        }
      }
    }

试图找到可以在文档中随处使用的功能