In the bunk beds room. The screen not only displayed the participants debts but also served as an introduction to their backstory and their reasons for joining the game, revealing Thanos' story, player number 230

In that video number 230 was standin on a bridge, getting slapped, then smoking a vape.

Thanos wasn't motivated by the hope of winning the prize money; rather, he entered the Squid Game with the intention of ending his suffering. The game, in his eyes, was a way out—a chance to die on his own terms, instead of continuing to suffer in the real world.