Multicast Stream

Hey there, we have a client that does a multicast stream with video and sometimes that stream drops and they have no way of noticing it unless a user calls in about it. Has anyone developed anything to monitor multicast from a Cisco switch or monitor the multicast stream from the network? Searches provide information from years ago (yes, not many people do multicast streams anymore). Just curious if anyone had something like this and if they've had a way  to monitor it.