/ip firewall mangle
add action=add-dst-to-address-list address-list=Youtube chain=forward content=googlevideo.com dst-port=80,443 log=yes protocol=tcp
add action=mark-connection chain=forward dst-address-list=Youtube new-connection-mark=Youtube
add action=mark-packet chain=forward connection-mark=Youtube new-packet-mark=Youtube
/queue type
add kind=pcq name=Youtube144p pcq-classifier=dst-address pcq-rate=420k
/queue tree
add name=Youtube144P packet-mark=Youtube parent=ether2 priority=1 queue=Youtube144p
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