Setup CSP for YouTube sandbox.
@ -2,6 +2,7 @@
<html>
<head>
<title>YouTube Player Sandbox</title>
<meta http-equiv="Content-Security-Policy" content="default-src 'none'; script-src __PARENT_ORIGIN__ https://www.youtube.com https://s.ytimg.com 'unsafe-eval'; frame-src https://www.youtube.com; style-src 'unsafe-inline'">
<style type="text/css">
html, body {
height:100%;