We often forget just how incredible the technology in a spinning drive is. We just take for granted that the size and speed of said drives will just keep increasing without thinking of the incredible speeds already present in the drives. Take for example the actuator arm in the video: it moved back and forth 22 times in just a mere 0.25 seconds.
That works out to just over 0.01 seconds per movement. Incredible. It's not recommended that you try this at home as opening the case of an HDD will allow dust in and will kill the drive extremely quickly. Additionally, most people don't have cameras capable of 1000fps just laying around in their homes.
That said, the video shows just how incredibly nimble and beautiful the inner workings of a disk drive are. That said, a solid state drive is faster and still one of the best upgrades you can do for a computer.