@levin-seitmola said in Iframe YT video „autoplay” it stops working after version 53: <iframe width="560" height="315" src="https://www.youtube.com/embed/GcP97c8LejA?rel=0&autoplay=1&showinfo=0&autohide=1" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe> If I go to youtube.com and replace the pages source with that markup, the video autoplays just fine. But, you can play with opera://flags/#autoplay-policy if you want. @levin-seitmola said in Iframe YT video „autoplay” it stops working after version 53: allow= I'm not familiar with that attribute for iframe.