Learn Performance - Video

This demo shows a YouTube embed using an iframe.

The below waterfall illustrates the resources required to render this page.

There are a total of 17 requests, 15 of which are to the third party. Of these, 4 of the requests are render-blocking. As a result, the poster image of the YouTube embed is only visible at 5.6 seconds, once the maxresdefault.jpg image has finished downloading.

<iframe
  width="560"
  height="315"
  src="https://www.youtube-nocookie.com/embed/CWTm0ccfZe4?controls=0"
  title="YouTube video player"
  frameborder="0"
  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
  allowfullscreen
></iframe>