[chiphead]

I listened to it again with my eyes closed, so I could focus on the noise and not the video. I hear some piston slap, but I also hear a constant rattle that sounds faster than slap should be. Is there anything loose on the engine like aircleaner lid, bracket, spray paint can, wrench, etc that would be making a fast rattle? If not, it sounds like a rod bearing or small end hitting the piston pin boss.

Rods get noisier as the oil thins.