Javascript Youtube iframe API，订阅事件

我如何订阅这里的活动？我想收听视频结束。

请查看我的函数，如此答案中所定义：

在您的情况下，实现如下所示的核心功能：

// 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();
                    }
                }
            }
        });
    }
});