System and method for aggregation and monitoring of multimedia data stored in a decentralized way

System and method for aggregation and monitoring of multimedia data stored in a decentralized way for triggering upcoming class action events, whereas source databases (401,411,421,431) of the network node (40,41,42,43) are accessed by means of a filter module (30), and for at least one rating parameter (320,321,322) in connection with assigned search key words (310,311,312,313) and/or the assigned source databases (401,411,421,431) with respect to an time-based rating and an exposure-based frequency rating a scorecard (330,331,332) is generated with found data sets, and whereas by means of a parameterization module (20), based on the scorecard (330,331,332) for the respective rating parameter (320,321,322) with respect to their exposure-based frequency a variable frequency value (21) is generated at least partially dynamically, which variable frequency value (21) corresponds to network (50) class action frequency variations, with respect to time, and whereas by means of a tracing unit based on a generated assigned distribution of the variable frequency values (21) a predefined exposure threshold is triggered, whereas a trigger signal is generated with respect to time and the variable frequency values (21) and transmitted for activation to a receiving work unit.