Youtube iframe "loop" doesn't work

Behind the loop magic

Indispensable conjunction of parameters

The loop parameter in the YouTube iframe URL is set to 1 to kickstart looping. However, due to YouTube API's mechanism, loop alone doesn't apply when playing a single video. Thus, making loop work in tandem with playlist is indispensable:

<iframe src="https://www.youtube.com/embed/VIDEO_ID?playlist=VIDEO_ID&loop=1">

iframe structure: no margin for error

Error-free iframe code goes a long way in ensuring smooth functionality. For instance, if you wish to start the video automatically, ensure the autoplay parameter sets the tone right:

<iframe src="https://www.youtube.com/embed/VIDEO_ID?playlist=VIDEO_ID&loop=1&autoplay=1">

ProTip: autoplay=1 does exactly what you would expect — it plays DJ Khaled's "All I Do Is Win" on loop. Just kidding! It starts your video immediately.

Embracing platform diversity

React Native and other frameworks handle iframes distinctively. In case you're using a WebView, keeping JavaScript enabled and regulating video dimensions will ensure your video behaves:

<WebView
  source={{uri: 'https://www.youtube.com/embed/VIDEO_ID?playlist=VIDEO_ID&loop=1'}}
  javaScriptEnabled={true}
  style={{width: '100%', height: '100%'}}
/>
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NerdNote: This WebView tag is like your grandma reminding you to wear a jacket. It takes care of you and your code.

Leveraging the YouTube Player API

With the YouTube Player API, seize control over video playback by handling events like onPlayerReady and onYouTubeIframeAPIReady. Use API methods like setLoop(true) and setVolume(volume) for additional control:

function onPlayerReady(event) {
  /* Set the volume or loop as needed */
  // Crank up the volume to 11...wait, only 50%?!
  event.target.setVolume(50);
  // Let's keep this party going, people!
  event.target.setLoop(true);
}
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Tweaking player settings

Craft the perfect video playback experience for your users by adjusting iframe parameters such as controls and showinfo:

<iframe src="https://www.youtube.com/embed/VIDEO_ID?playlist=VIDEO_ID&loop=1&controls=0&showinfo=0">

SuperImportant: Match parameters and video IDs, else you might end up in Narnia (or, even worse, with a non-looping video).