OK video except for the wild speculation that the uboat commander was going to "machine gun" the people in the lifeboats.
The programming is so strong in society that every german was an despicable not-see, long before not-sees were even invented.
In fact, even the not-see german navy of ww2 was generally an honorable organization.
On second thought, the video was ruined with the reflection of past events through the woke triggered modern hysteria.