clear externalvideo stream properly on meeting removed

bigbluebutton-html5/imports/api/external-videos/server/methods/destroyExternalVideo.js

 import { Meteor } from 'meteor/meteor';
 import Logger from '/imports/startup/server/logger';
-import { extractCredentials } from '/imports/api/common/server/helpers';
 
-export default function destroyExternalVideo() {
-  const { meetingId } = extractCredentials(this.userId);
-  if (!meetingId) return;
+export default function destroyExternalVideo(meetingId) {
   const streamName = `external-videos-${meetingId}`;
 
   if (Meteor.StreamerCentral.instances[streamName]) {

bigbluebutton-html5/imports/api/meetings/server/handlers/meetingDestruction.js

@@ -10,7 +10,7 @@ export default function handleMeetingDestruction({ body }) {
   const { meetingId } = body;
   check(meetingId, String);
 
-  destroyExternalVideo();
+  destroyExternalVideo(meetingId);
   removeAnnotationsStreamer(meetingId);
   removeCursorStreamer(meetingId);