...If they don't, there is not much that can easily be done for the cuteTube player, since the backend does not support SSL (hence the error message).
$ /opt/cutetube2/bin/cutetube2 QNetworkReplyImpl::_q_startOperation was called more than once QMutex::lock: mutex lock failure: Invalid argument QMutex::lock: mutex unlock failure: Invalid argument Segmentation fault (core dumped)