/ip firewall address-list
add address=
youtube.com list=slow-list
add address=
www.youtube.com list=slow-list
add address=
youtu.be list=slow-list
/ip firewall mangle
add action=mark-packet chain=forward new-packet-mark=slow passthrough=yes src-address-list=slow-list
add action=mark-packet chain=forward dst-address-list=slow-list new-packet-mark=slow passthrough=yes
/queue simple
add max-limit=64k/64k name=slow packet-marks=slow target=
192.168.88.0/24