As not all the devices connected to the switch need IPTV service, we can configure IGMP Snooping on the switch so that only host B and host C can receive the IPTV programs.
Configure the IGMP version as v3 so that the switch can process IGMP messages of all versions. https://lewysmlhm312366.tinyblogging.com/iptv-portugal-a-maior-divers%C3%A3o-em-full-hd-74351828