from hamada unthinkable trial scene

I have been looking for an old video during Hamada’s unthinkable trial episode. At the part where Matsumoto tells a story about shinsuke’s show where downtown did a 6 months documentary about an old man participating in a triathlon marathon for the first time. Does anyone know where to find this old video?

The best bet is that there might not be a video . Since they themselves inserted drawings instead. Which also begs the question :did it even really happen?.