LOL, forgot about this video. My .02 is the dude popped the freehub off with the cassette still attached. Slid it all up in the dropouts and dunked the axel in Stans sealant before tightening the rear drop out. So when I got it the cassette was moving around and wobbled and the axle was stuck in there so I thought the axle was bent from an impact since it showed up with the broken derailleur hanger...
The joy of buying used