It's possible that I accelerated the failures on mine by commuting to work and then leaving my bike parked outside when it rained. The left side bearing was in worse shape, contributing most of the noise and play in that first video, and I always lean my bike to the right when locking it up...
I should make clear that I'm not upset about any of this. No bearing is perfect, and they have a rough life in service on bicycles. I'm glad that it's fixable.