2003 Infiniti M45 making a loud noise when driving?

[03M45BEAST]

If anyone can help me with this problem it would be awesome. Im putting a link for a video of the sound when driving. It doesn't make that sound or any sound when still. Not even my mechanic can figure out if its coming from the front or rear lol https://youtu.be/E71fjUCbvY8

[EdBwoy]

Hello and welcome to NICOCLUB.
How about some background on the issue - did the noise suddenly start or has it always been there?

Anyway, check the brake shields. You can push them through the spokes inwards; but instead of messing with them if they're fine, just spin each wheel and you should hear any scraping.
Secondly, and more likely, there are exhaust shields under the driveshaft tunnel but above the driveshaft. Check under there as well to see if one is hanging loose.

[03M45BEAST]

My brother took the car out of state for a week, when I went to go pick it up it started doing that.I checked everything that has to do with brakes. I haven't checked the exhaust shield. There is an exhaust leak. Can that maybe be a part of the problem? The leak wasn't there before my brother took it. I asked him and he said he doesn't remember any sound lol

I will check that exhaust shield today Thanks