Direct HTML embedding doesn't work from 1.9.0 version

It just works for me

```
<html>
<body>
  <div data-embedo-url="https://www.youtube.com/watch?v=cwQgjq0mCdE"></div>
</body>

<script type="text/javascript" src="https://unpkg.com/embedo@1.9.0/embedo.min.js"></script>

<script>
  new Embedo({
    youtube: true
  });
</script>
</html>
```