Hard to tell from inside, I'll make another video from the outside, but one of my coworkers asked me if it's a diesel lol
Exhaust manifold was already replaced last year :'(Sounds like my 02 did. I kinda liked it lol.
The sound can be amplified by a manifold exhaust leak. Mine had a broken bolt or two that would cause it to be noisier and more diesel-ish on a cold start (and when it would warm up would tame a fair bit). When I got the manifold replaced later it was quieter, but still had a bit of that sound.