If you would like to join this team, just submit your request and send a send a message to the <email address hidden> mailing list explaining how you would like to help. It would be also good if you subscribe to it; you can do this here: http://eurion.net/mailman/listinfo/qttube-dev_eurion.net.
The QtTube team is for all those that would like to contribute in some way with the development or testing of QtTube.