title: How can I get a list of videos from a playlist in an auto-generated YouTube channel via the API?
body: <p>YouTube has introduced auto-generated channels, for example <a href="http://www.youtube.com/channel/UCH-BBvNWh1CONPAjpeocGcw" rel="nofollow">http://www.youtube.com/channel/UCH-BBvNWh1CONPAjpeocGcw</a>. From the channelId, I can use the API 
  to retrieve its associated playlists:</p>
  
  <pre><code>GET https://www.googleapis.com/youtube/v3/playlists?part=contentDetails&amp;channelId=UCH-BBvNWh1CONPAjpeocGcw&amp;key={YOUR_API_KEY}
  </code></pre>
  
  <p>gets, in part:</p>
  
  <pre><code>"items": [
  {
  "kind": "youtube#playlist",
  "etag": "\"GbgM9_0DKhSLzW6BxAmfOJZH9RI/q_Rxfox9sHfH_r9g_LimnQeVsyU\"",
  "id": "ALNb4maWNoT6RXC29sfG8iREznyAb9tqqJ",
  "contentDetails": {
      "itemCount": 95
  }
  },......
  </code></pre>
  
  <p>Each playlist has an id and an itemCount. When I use the playlistId, I get no items back:</p>
  
  <pre><code>GET https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&amp;id=ALNb4maWNoT6RXC29sfG8iREznyAb9tqqJ&amp;key={YOUR_API_KEY}
  </code></pre>
  
  <p>gets me</p>
  
  <pre><code>{
  "kind": "youtube#playlistItemListResponse",
  "etag": "\"GbgM9_0DKhSLzW6BxAmfOJZH9RI/3cxjRXf86G9z5Bg7rup3QfCgrxM\"",
  "pageInfo": {
      "totalResults": 0,
      "resultsPerPage": 5
  },
  "items": [
  ]
  }
  </code></pre>
  
  <p>Am I missing a step?</p>