This score is given based on various categories such as sound and video quality, editing, content and pace - on a scale from 0 to 10.
F4mi is just really good at making random niche topics interesting - in this case it is an old game where you have to prank a neighbour. The way the topic is explored, the history of the game, the company who made it and the current status is so well put together that it makes you really watch till the end.