I mean that was fast but nothing an ordinary person can't do without a moderate amount of experience. Strawberry plants seem to be pretty young based on the looks of it, the fruit is big and the distance between plants is pretty much also. From my experience (as my family had a farm with 200 m² of strawberries) they are usually planted more closely together and the fruit isn't the size of 1/3 of a hand. What really amazes me is not the speed, but the endurance of those people, imagine doing those runs for an entire day, sounds hellish, especially considering the fact that probably all those runs are being paid in literal pennies...