[
Error: Irreparable invalid markup ('<iframe [...] </iframe>') in entry. Owner must fix manually. Raw contents below.]
<iframe width="500" src="https://www.youtube.com/embed/5YGc4zOqozo" frameborder="0" </iframe="</iframe"></site-embed>
United Breaks Guitars, p2:
<site-embed id="17"><iframe width="500" src="https://www.youtube.com/embed/h-UoERHaSQg" frameborder="0"></iframe>