It doesn't look like this site allows embedded videos. Normally, you'd get the embed code by clicking "Share", then "Embed" on your video, then wrap that in HTML tags ( [HTML] ), but it does nothing here:
HTML Code:
<iframe width="560" height="315" src="https://www.youtube.com/embed/ZRFV_rATtF8" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>