int limit = 49;
YoutubeService tubeService = new YoutubeService();
tubeService.setPage(1);
tubeService.setLimit(limit);
List<Tube> listToAdd = new ArrayList<Tube>();
tubeService.searchByChannel(channelId, true);
for (Tube tube : tubeService.getListResult()) {
tube = processTubeDetail(playlistId, tube);
String uri = tube.getAuthorUrl();
if (uri != null && uri.length() > 0) {
if (AuthorModel.getById(uri) == null) {