[norsairius]

This same noise noise is present with my car as well and it's only present on cold starts and goes away once the car warms up. The knocking noise does not speed up or change as the engine revs, so I'm not particularly worried about it being a bad rod bearing or anything of that sort. The car still performs just fine too.

I had an indy shop recently replace the harmonic balancer in my car and they were listening closely to the motor on cold starts because I mentioned a squeaking noise that was only present during such starts. They didn't raise any concerns, so I'd guess that it's fairly normal or at least not anything to worry about.

That said, I'm judging that based only on the video, so if you're really worried about it you should probably still get it looked at. I'd be curious to know what another shop/mechanic would have to say about it.