Beautiful videos, Damo!
They really highlight the best parts of SH5. Unfortunately they also highlight one of the worst parts, at least for me. Not one of the SH games has fixed the fact that the purpose of a harbor is to protect ships from the weather. So the Panzerschiffe is rocking back and forth like it's in a storm and your poor u-boat is bouncing up and down like a cork in what we English-speakers call "safe harbor".
None of which is your fault, of course, and I apologize for going off on a tangent, but it was so obvious to me that it hurt. I'll try not to do it again.
Oh, I saw that wake! The speed limit in harbor is 5 knots!