It's a shame, but it's actually two very simple mistakes. The clunk, that is just the wrong size Woodruff Key and tightening of bolts.
The second issue, albeit simple, an overtightened belt has major consequences in damaging the flywheel or pulley bearings.
My bearings don't sound half as bad as your video, they're still damaged. Loosening the belt has improved the noise, but it's still there. With me being a person who likes to fettle and sort problems, that is why I didn't just return the Kickr until I knew what the problems were. Now Wahoo are fully aware from various websites, they will fix the problems. I'm waiting till nearer Xmas before returning for a replacement. I don't want to be without a turbo for a few weeks. There is a back log of orders and returns to deal with, so Wahoo will be busy for a few months sorting it
. That sounds like an old washing machine 
