Wired Transmission Rattle noice
 

Please have a look on that 1 min video I just made. Please listen to the end where I put mik a bit closer to transmission to catch that noise.

http://www.youtube.com/watch?v=ax2BtNoNHxk

Is that wired metallic rattle noise that comes out from transmission the damage of clutch bearing or can be something else?
Please note that the rear of car is on jack stands and the car is free running on 3rd gear without any wheel load.
You can not hear it at 1st gear, a very, very little on 2nd gear and the most is on 3rd ,4th and 5th.
Normally when I drive I do not hear anything like that inside the car but my exhaust is quite laud. Maybe that is normal transmission sound as wheels are not loaded and everything is running without load?

I also disconnected the driveshaft from transmission and run car again. Rattle noise disappear on 3rd and 4th gear but is still on 5th

I do not hear any clutch noise when the car is not on a gear with clutch pedal pressed or depressed what would easily suggest problem with a clutch bearing

Any ideas? Should I worry or not?

Could it possibly be that pressure plate problem like I had with my 07 apparently there were a couple bolts left out, so primarily when I started the car cold it rattled some ugly but when warmed up it seemed ok, there was a TSB on it I took it in an I think they replaced the whole plate .
Just a thought same area was kinda hard to hear exact on it.

Thanks that is possible as sound comes rather from that bell looking end of transmission rather then from gears. But I can not hear nothing like that when I drive only on that free wheel spinning on 3rd 4th and 5th gear.

What gear your problem appear? Or it was on every gear?