MikroTik basic concept on how to block or limit netflix bandwidth
used layer 7 protocol
^.+(netflix|nflxext|nflximg|nflxsearch|nflxso|nflxvideo).*$
or you can add an ip address-list and use dst-address-list rather using a layer7 protocol
/ip firewall address-list add address=www.netflix.com list=netflix