iframe video autoplay 방법
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<iframe width="560" height="315" src="https://www.youtube.com/embed/BPFuHLmiXXE?autoplay=1&mute=1&playsinline=1" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</body>
</html>