title: How to use API KEY with YouTube in angularjs and list videos in a playlist?
body: <p>I want to list a bunch of videos from YouTube in my mobile app using angularjs.
  Preferrably I'd like to list all videos of a user/channels specific playlist.</p>
  
  <p>I've gotten the API KEY from Google Developer Console but I don't understand how and where to use it. In this documentation they only go over the oauth method. <a href="https://developers.google.com/youtube/v3/code_samples/javascript#authorizing_requests" rel="noreferrer">https://developers.google.com/youtube/v3/code_samples/javascript#authorizing_requests</a>
  I tried using the example code straight up from that documentation only to get a message saying I have to authenticate first.</p>
  
  <p>I'd really appreciate some help into this. 
  How do authenticate using the api key and secondly how to make the request to get the videos in a playlist.</p>
  
  <p>ps. I'm a newbie developer and I'm using angularjs and ionic framework for my first learning project. I'm fresh out of Codeschool's courses in css, jquery, javascript, backbone and angular. ds.
  Thanks!</p>