@crazyone my videos are on the second post, not on the first one :P
Anyway, after a trip to the dealer, it looks like the rear right bearing is on it's way out even though the bearing has been replaced with a brand new F.A.G. bearing only 2 months ago and has less than 500 miles
This is really crazy but I can't do anything about it unfortunately.

 

Same Thing happened on MY BMW. I assume you have Quatro. On Rear Axels, Bearing and the Hub has to be changed. IF they don't change the Hub, Bearings will go. See if you have a Hub and have them check that again.

 

No, the car is not a Quattro, but the tapered roller bearings are very sensitive and if the screw is too tight then the bearing will fail really fast. So either the bearing was bad from the beginning or the mechanic tightened the screw too much.