@media only screen and (max-device-width: 430px) {
    #youtubechannel-player, #youtubechannel-frame {
        width: 395px !important;
        height: 222px !important;
        margin-right: 0;
    }
}

@media only screen and (max-device-width: 400px) {
    #youtubechannel-player, #youtubechannel-frame {
        width: 330px !important;
        height: auto;
        height: 185px !important;
        margin-right: 0;
    }
}

@media only screen and (max-device-width: 321px) {
    #youtubechannel-player, #youtubechannel-frame {
        width: 290px !important;
        height: 163px !important; 
        margin-right: 0;
    }
}