IGMP proxy guide

[Ricardo]

Hi folks, wondering if there is any 1st party or 3rd party explanation what exactly the os-igmp-proxy does, and how it works in Opnsense?
Unfortunately, docs.opnsense is not a help, I only found 1 single article about this topic: "Orange IPTV"

I am planning to route DLNA traffic across a VPN tunnel, and wondering if IGMP proxy is the way to do. But for that I would need some reading material to figure it out. Search in old threads on this forum revealed some 1-question 0-answer abandoned hope topics.