Question

YouTube iframe API: how do I control a iframe player that's already in the HTML?

How do I subscribe to events here? I would like to listen for video finish.

Answer 1

Have a look at my function as defined at this answer: Listening for Youtube Event in JavaScript or jQuery.

In your case, implement the core functions as shown below (Fiddle: http://jsfiddle.net/w2w5x/)

// Core functions defined at https://stackoverflow.com/q/7988536#7988536
var player;
YT_ready(function(){
    var frameID = getFrameID("YOUR-frame-or-container-ID-here");
    if (frameID) { //If the frame exists
        player = new YT.Player(frameID, {
            events: {
                "onStateChange": function(event){
                    if(event.data == "0") {
                        //The video has finished
                        alert("The video has finished!");
                        //Do something, example: play again
                        player.playVideo();
                    }
                }
            }
        });
    }
});