Can not insert multiple videos into a playlist - YouTube API v3

Question

I am trying to add multiple videos to a playlist, but only one video is added to the playlist. I can successful create a playlist and insert a video to the playlist, but can

Answer 1

One solution is to add delays for every insert into a playlist. I'm not entirely sure why a delay is needed though.

I am using a custom loop too with setTimeout();.

Example implementation using delays:

// Global array holds links and a global counter variable
var links = [
  "wtLJPvx7-ys",
  "K3meJyiYWFw",
  "3TtVsy98ces"
]
var counter = 0;

function addVideosToPlaylist() {
    myLoop(links[0]);
}


function myLoop() {
    addToPlaylist(video_id);
    setTimeout(function() {
        counter++;
        if (counter < links.length)
            myLoop(links[counter]);
    }, 3000);
}