I've done similar videos in the past but this is a bit different.
I wanted to see how much dust accumulates in the computer in 6 months.
Dust gets into your equipment many different ways but the most common is via the fans and electrostatic attraction. A build-up of dust over time creates a thermal blanket that eventually leads to equipment overheating, or failing.
More dust means more heat which means the fans have to run faster, requiring more energy and causing more heat in the room.