Delete videos from playlist using YouTube API - youtube-api

Question

I'm trying to delete a video from one of my playlists using the YouTube API. I'm properly authenticated but I'm still getting the following error:
{
"code" : 403,
"errors" : [ {
"domain" : "youtube.playlistItem",
"location" : "id",
"locationType" : "parameter",
"message" : "Forbidden",
"reason" : "playlistItemsNotAccessible"
} ],
"message" : "Forbidden"
}
I'm following the instructions here: https://developers.google.com/youtube/v3/docs/playlistItems/delete
But what I don't understand is where you're supposed to put the playlistID. I see where you put the videoID, but how does it know which playlist to delete from? I think that's my problem. Here is the code in their example, and mine is identical:
// Sample java code for playlistItems.delete
public static void main(String[] args) throws IOException {
YouTube service = getYouTubeService();
try {
HashMap<String, String> parameters = new HashMap<>();
parameters.put("id", "REPLACE_ME");
parameters.put("onBehalfOfContentOwner", "");
YouTube.PlaylistItems.Delete playlistItemsDeleteRequest = youtube.playlistItems().delete(parameters.get("id").toString());
if (parameters.containsKey("onBehalfOfContentOwner") && parameters.get("onBehalfOfContentOwner") != "") {
playlistItemsDeleteRequest.setOnBehalfOfContentOwner(parameters.get("onBehalfOfContentOwner").toString());
}
playlistItemsDeleteRequest.execute();
}
}
There's not even an input for the playlistID in their "try it" section on the page, which also gives the same error. Just onBehalfOfContentOwner and id. I get the same error after putting in a videoID and executing it on the page. Where should I put the playlistID?

Answer 1

Figured it out. And to clarify: I was trying to delete a video from my own playlist and I was properly authenticated (I could add videos just fine).
Basically, I was using the wrong videoId. I was trying to use the short one you see in the url when you play a video (e.g. qNqfYtd3HTg). You need to use the one that comes back from PlaylistItems.list instead (e.g. UEwzdmpFaWdSbm5rQ3hPN29qNXFjM1c0c20zNVlRSC1hQi5DNUEzOUFFNkIyOUUzOTRC). The latter includes the information about which playlist the video is in. That's why you don't need to specify the playlistId when deleting a video from a playlist, just this one long videoId.
This is the videoId NOT to use when deleting a video from your playlist:
youtube.playlistItems().list("contentDetails,snippet").execute().items[0].snippet.resourceId.videoId
And this is the videoId to use:
youtube.playlistItems().list("contentDetails,snippet").execute().items[0].id