Cinematic in final round or final game

Hello, I’m doing a zone wars, in which of the two teams, as you know, the last one standing would be left, or the last team left alive. But, first I want to know how to do something, but above all to know if it can be done.
How can I add before the “victory” panel appears, an end-of-game cinematic (and then the predefined end-of-game or end-of-round panel appears)
Let’s imagine that before the end of victory panel appears, what I want is for the players to appear celebrating it, and that after 3 seconds, this cinematic ends and the round or game ends.