360 engine vibration

That is indeed unexpected based on the ring's wobble in the video. I would have expected the ring to be offset a bit. The pulley edge in the video does not seem to wobble at all but if the hub or crank snout was off, I would expect the pulley to wobble more than the ring.

If you pull the sump, then you can check out the crank for any deep holes in the counterweights or any slugs of metal installed in them. Plus rod part numbers.