<https://buzzoid.com/nl/how-to-play-youtube-in-the-background-on-your-iphone-a-short-guide/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://buzzoid.com/fr/how-to-play-youtube-in-the-background-on-your-iphone-a-short-guide/>