Part of the beach at Ocean Shores (on the Washington coast) is a designated highway so you can drive on the beach with any street legal, licensed vehicle.

I don’t know the backstory on how this RV wound up in the ocean but I’m guessing they drove it out in low tide and went for a walk. The tide can go out 50 yards or more in some places. Either way, kudos to the trucks and teamwork in getting this idiot out.