// playlist IDs relevant to the channel, including the ID for the
// list that contains videos uploaded to the channel.
YouTube.Channels.List channelRequest = youtube.channels().list("contentDetails");
channelRequest.setMine(true);
channelRequest.setFields("items/contentDetails,nextPageToken,pageInfo");
ChannelListResponse channelResult = channelRequest.execute();
List<Channel> channelsList = channelResult.getItems();
if (channelsList != null) {
// The user's default channel is the first item in the list.
// Extract the playlist ID for the channel's videos from the
// API response.