Youtube api v3 Get list of user's videos

I managed to retrieve all videos by user name using v2:

https://gdata.youtube.com/feeds/api/users/GoogleDevelopers/uploads?alt=json&start-index=1&max-results=50&v=2

I haven’t find an API to get all videos directly, however it can be done by two steps (thanks to http://stackoverflow.com/questions/22613903/youtube-api-v3-get-list-of-users-videos) :

Step 1: get the user’s relatedPlaylist (uploads) id by:

GET https://www.googleapis.com/youtube/v3/channels?part=contentDetails&forUsername=GoogleDevelopers&key={YOUR_API_KEY}

Step 2: get all videos by the id retrieved in step 1:

GET https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&playlistId=UU_x5XG1OV2P6uZZ5FSM9Ttw&key={YOUR_API_KEY}&maxResults=50

by javascript

// Get Uploads Playlist
$.get(
   "https://www.googleapis.com/youtube/v3/channels",{
   part : 'contentDetails', 
   forUsername : 'USER_CHANNEL_NAME',
   key: 'YOUR_API_KEY'},
   function(data) {
      $.each( data.items, function( i, item ) {
          pid = item.contentDetails.relatedPlaylists.uploads;
          getVids(pid);
      });
  }
);

//Get Videos
function getVids(pid){
    $.get(
        "https://www.googleapis.com/youtube/v3/playlistItems",{
        part : 'snippet', 
        maxResults : 20,
        playlistId : pid,
        key: 'YOUR_API_KEY'},
        function(data) {
            var results;
            $.each( data.items, function( i, item ) {
                results = '<li>'+ item.snippet.title +'</li>';
                $('#results').append(results);
            });
        }
    );
}


<!--In your HTML -->
<ul id="results"></ul>