#1 makes the boat look like a cork bobbing in the waves.
#2 looks good for the first 12 seconds or so, and then the rolling gets ridiculous again. 3 seconds to go from 30 degrees port to 30 degrees starboard in anything less than a typhoon is a bit over the top. (pardon the pun) These are 1500 ton displacement (not DWT) vessels navigating open ocean swells, not cigarette boats bouncing through the chop in Biscayne Bay.
Having said that, it occurs to me the problem might not be the physics related to the sub, but the ocean itself. The waves do seem to be a bit exaggerated, in both amplitude and frequency. The waves in your video are more like what you might expect during storm conditions in very shallow water. Deep water waves just don't behave that way.
IMHO
JD
|