That video was of an E55. Our cars don't have an issue with the stock crank pulley that I'm aware of. The problem occurs with the installation of a 178, 181 or 185. If it's not installed or torqued correctly it will loosen up and wobble like crazy or strip the key off the crank snout. I've read of failures of the idler pulley and perhaps the water pump pulley but those were mostly on cars with a Code3, 178, 181 or 185, in other words, not stock.

Les