I suppose it just depends. Typically, the end user provides this information, but the US has a number of buoys in various regions around the US to pull hard data from.

With respect to marine growth, they may have plans to maintain and remove, or they may install an anti-growth paint. Either their equipment will get a very minor, thin coat, or if they choose to let it go, it'll look like the world's ugliest prom dress.

With regards to the 2 videos, they both very simplistically simulating the waves on a beach.

You might find this video to be interesting, although perhaps not exceptionally helpful. My takeaway, though, is that breaking waves just aren't as powerful as normal waves, but you could argue they strike in a more concentrated point higher up... sometimes.

https://youtu.be/SWhPJmfLzNo