Small detail that is important: in order to prove your country of residence, you will need to have made a purchase on Steam between November 14, 2021 and November 14, 2022. Then, when the Game Awards are broadcast on December 9, a new person will be drawn among those registered for the event who are watching the event on Steam. The name of the winners will then be displayed in the chat.
In short, if you have a Steam account, you meet the selection criteria and you have no problem staying up all night on December 8, this contest is for you.