That video was a good one to watch. Last weekend when we went down to Umatilla, OR on Friday morning and had to turn back because of the large waves, after I turned around we had a following sea.
I could feel the effects of the waves on the stern but they were minimal due to the shape of the stern of the boat...
If there was a large, flat stern like many boats have I'm sure I'd have felt it more. I stepped up the pace by about .5kts and was able to stay ahead of the waves.