For your consideration, the jukebox from my old CS club:

    #!/bin/bash
    cd songs
    if [[ ! -p q ]]; then
        mkfifo q
    fi

    (while true; do echo "playing" | nc -l 10000 | head -n 1 | cut -f 2 -d " " | cut -b 2- | grep -E "^[a-zA-Z0-9/:.?=-]{1,}$" > q; done) &

    while true; do
        if read a <q; then
        echo $a;
        fn=$(youtube-dl -f m4a --id --get-filename $a);
        youtube-dl -f m4a --id $a
        echo $fn
        mplayer $fn
        fi
    done

To queue up a song, we'd find it on youtube and prepend "http://jukebox.local:10000/" to the url