This has been driving me crazy, the noise is defenitly not coming from the engine is coming from the mid front of the car underneath. Does anyone know what this could be? Its an 06 coupe, 64k Auto...

99.99% of the time that rattle is the heat shield around the exhaust. Mine did that and the dealer just tightended it and sent me home. Never had it again.

wait wait, i listened to it again(on better speakers lol) and that sounds different then my issue.

any perfomrance loss or weird smells? does it get worse or better with driving?

So far so good no performance lost or smell.. But it does get louder after the car heats up.. It kind of sounds like it coming from the transmission. I am going to take it to the dealer on monday and see what they say just want to some research before i go..

The video is blocked but my catalytic converter is going bad and makes a rattling noise.

My car rattles when I am accelerating through 1.5k RPM - 2k RPM in 1st and 2nd gear dont know why. They say its my heatshield but i dont even have a heat shield in my cats. anyone know whats wrong with mine?

Some times vids are worthless in pin pointing noises, get your G on the rack with a hand full of sockets and look for anything that's loose. Converter shield is a good place to start.... Be careful not to over tighten anything!
Gary