Там в скрипте вот такая команда на *youtube.com* )
*youtube.com* )
PAGEPATH=`echo "$1" | sed 's/\/v\//\/watch\\?v=/'`
echo "`wget -O- $PAGEPATH | grep yt.playerConfig\ = | \
sed 's/\\u0026quality.*$//;s/^.*http/http/;s/%3A/:/g;s/%252F/\//g;s/%253A/:/g;s/%2526/\&/g;s/%253F/\?/g;s/%253D/=/g;s/%3D/=/g;s/%252C/,/g;s/%26/\&/g;s/%2F/\//g;s/%3F/\?/g;s/.$//'`"