title: Youtube API v3: Retrieving multiple channels at once (quota, limits)
body: <p>The "channels.list" function has a "id" parameter ("The id parameter specifies a comma-separated list of the YouTube channel ID(s) for the resource(s) that are being retrieved")</p>
  
  <p>My tests showed that it's possible to retrieve 50 channels at once. Otherwise I'm getting a (400) Bad Request in Google_Http_REST::decodeHttpResponse.
  Is this because of the maximum length of HTTP GET requests, or is this a server side limit?</p>
  
  <p>And is it better for the quota consumption to make one call with multiple channel ids or is it the same as multiple requests with one channel id each?</p>
  
  <p>Thanks!</p>