If this was Russian video cam recording, you'd assume the drivers were stone drunk. Ironically, maybe an even sadder reflection of a society if all these drivers were sober. Don't know all the ends and outs of Saudi criminal/civil justice, but apparently if you negligently kill someone, you can get the death penalty, but there's an out, if you can pay adequate "blood" money to the decedent's family, you're home free.
From what I read, a significant percentage of the Saudi citizenry lives off of government stipends from oil royalties. Almost all manual labor, and a large percentage of desk jobs, etc is performed by legal temporary immigrants. I would guess that there's a large number of young Saudi males with nothing to do and enough money to buy these cars to get into trouble.
I have read where some of these drift drivers have been beheaded.