Louder than my 2012 C5, which has more "Tic Tic" than I'd prefer, but not as loud as my C5 when the auto-decomp cam failed. That was an UNRELENTING, Loud, metallic TANK TANK TANK sound like gremlins banging away on the innards with a small ball peen hammer.
Seems like the noise let up briefly in the video, which makes me think it might be lifter related. I'd be concerned that a particle from break-in has gotten into one of my hydraulic lifters. I would try a solvent flush and oil change.
If that didn't remediate the issue, I'd be tempted to pull the tank and pull off the rocker covers to make sure the rocker bearing blocks were fastened down tight. While I had the covers off, I might run the engine briefly to see if I could hear or feel something that let me diagnose the issue better. I'd be ready to mop up oil that spilled or got thrown around.