Using the Vidyard player API to grab the Vidyard visitor ID for a given viewer.

get_visitor_id.js

var player = new Vidyard.player(uuid);
var callback = function() {
	if (!player.metadata.visitorID) { return; }
	// We have a visitor ID, do things!
	console.log(player.metadata.visitorID);
	// If we only want this callback to execute exactly once:
	callback = function() {};
};

player.on('ready', callback);
player.on('visitor', callback);