get video id from youtube playlist in as3 - youtube

Question

How to get video id from youtube playlist in as3, in order to play latest uploaded video from you tube playlist.
I have load pLay List and it plays properly but I want to play only latest video from play list.
Thank you

Answer 1

You can use the Youtube Data API to fetch information about the items in a playlist.
In order to be able to use the API, you need to generate an API key. Info about how to do so can be found here.
To get the latest video in a certain playlist you can make a GET request for this URL:
https://www.googleapis.com/youtube/v3/playlistItems?part=contentDetails&maxResults=1&playlistId={YOUR_PLAYLIST_ID}&key={YOUR_API_KEY}
Let's break it down to see what it does:
https://www.googleapis.com/youtube/v3/playlistItems - This is the URL endpoint to request data about playlist items in the Youtube Data API
?part=contentDetails - We define what details we want returned from the query. In this case we want the video id's, so we use contentDetails
&maxResults=1 - We are only interested in one item - the latest. (It appears that the result is ordered from latest to oldest, so by only requesting the first video it should return the latest.)
&playlistId={YOUR_PLAYLIST_ID} - Replace this value with the ID of the playlist in question.
&key={YOUR_API_KEY} - Replace this value with your API key.
Let's look at a sample request:
var playlistUrl:String = "https://www.googleapis.com/youtube/v3/playlistItems?part=contentDetails&maxResults=1&playlistId=PL4Sz7_l-PtwAG8xye4Y9whykc4OAwbN9f&key={YOUR_API_KEY}"
var playlistReq:URLRequest = new URLRequest(playlistUrl);
var playlistLoader:URLLoader = new URLLoader();
playlistLoader.addEventListener(Event.COMPLETE, handlePlaylistUrlLoaded);
playlistLoader.load(playlistReq);
function handlePlaylistUrlLoaded(e:Event):void {
trace(playlistLoader.data); // See the response below
var playlistResponse:Object = JSON.parse(playlistLoader.data); // Parse the JSON response
trace(playlistResponse.items[0].contentDetails.videoId); // Prints "21Ox58OKFmo" which is the video id of the latest video in this playlist
}
The raw response to this sample query is:
{
"kind": "youtube#playlistItemListResponse",
"etag": "\"FOuwADrXJjsTKgUIQJoQC6nKNFY/n3kL7MtTJyPOfHU6jmro9gAC1CI\"",
"nextPageToken": "CAEQAA",
"pageInfo": {
"totalResults": 189,
"resultsPerPage": 1
},
"items": [
{
"kind": "youtube#playlistItem",
"etag": "\"FOuwADrXJjsTKgUIQJoQC6nKNFY/aNpryIHyioAUu4C9_WVP8kZGbuE\"",
"id": "PL88DYY_1F2muJ4Dv0iAFHEuKQuma2y_BH0WbF7AzESJw",
"contentDetails": {
"videoId": "21Ox58OKFmo"
}
}
]
}
Edit in response to further details
If you want to use the YouTube player API, it seems like you have to wait for a "video cued" event after adding the playlist to the cue.
So, in essence, this should work (untested code):
youtubePlayer.addEventListener("onStateChange", onPlayerStateChange);
youtubePlayer.cuePlaylist("{YOUTUBE_PLAYLIST_ID}");
function onPlayerStateChange(event:Event):void {
if (Object(event).data == YT.PlayerState.CUED) {
// Playlist cued, the playlist data should now be accessible
var playlist:Array = youtubePlayer.getPlaylist();
trace(playlist[0]); // This value should now exist
}
}