Dawg...yep it is amazing how many people go to their boats on a weekend and never leave the dock cause they see some whitecaps.
It is really hard to judge wave height in a video and it usually looks a lot less than it is..and a swell can come from far away and be big even on a windlass day. The surface of the water though is a pretty good indicator which is why I gave the estimate that I did. Here's a link to a pretty good description of what you see at various wind speeds. And of course...heading into a 10 knot wind at 10 knots makes it FEEL like 20 knots.