Thanks so much for your help! You would know much better than I. I am still holding out hope that it may be something else though. Especially since it has gotten better and not worse. And my trustworthy shop said it was 1 of the pulleys. Are you 100% sure? I have heard many 3rg gen X's and none of them are similar to mine. I included the description from the main video below.
Hoping we can help each other with this one. I've been chasing this rattle noise for about 1 yr ever since I bottomed out my exhaust on the Y pipe. It only happens when in gear and at 2000-2800 RPM. Seems to have gotten better after re-sealing the flanges. Think it may be header related now. Tried spark plugs, wires, stethoscope (noob), exhaust prodding, idler pulley, tensioner, MAF clean, trans solenoids, band adjust, PCM reset. motor mounts and a PCV in the mail.