Red5CloudWatch is a subcomponent within Red5 Pro Stream Manager which acts as a communication bridge between an active Red5 Pro node and the stream manager.
Technically it is a Java servlet which formats and relays incoming HTTP/HTTPS communication from a Red5 Pro Node to the Stream Manager Red5CloudWatchClient.
The Red5CloudWatch relays important notifications such as:
Cluster Report: NodeGroup statistics about load and streams
Stream publish: Stream publish start notification from the origin
Stream unpublish: Stream unpublish notification from the origin
Node role assignment: Request by a newly initialized node to acquire its role in the group & operational configuration information.