Re: Infinitely worth every penny. Division by zero error!!!
Not even for broadcast video, or radio stations, or anything over the internet. It may be used by ISP to customer for IPTV broadcast (where the ISP is responsible for delivering the content to you, as opposed to the internet) but that'd sbout it.
Multicast is insecure, can be used to DDOS, and due to it's lack of popularity, doesn't even work in many routers.
The issues have been largely addressed with IPv6 multicast, so if/when our National TV services are switched from broadcast to internet, expect it to make an appearance then.. I can't see the BBC streaming the same HD content to 20 million devices at the same time any other way!