Execute a script when a file is ready to start playing in HTML?

HTML Web Development Front End Technology

You can use the oncanplay attribute for the following attributes − <audio> , <embed>, <object> and <video>.

Example

<!DOCTYPE HTML>
<html>
   <body>
      <video width = "300" height = "200" controls oncanplay = "display()">
         <source src = "/html5/foo.ogg" type = "video/ogg" />
         <source src = "/html5/foo.mp4" type = "video/mp4" />
         Your browser does not support the video element.
      </video>
      <script>
         alert("I am ready to begin.");
      </script>
   </body>
</html>