This video is called Humpback Ballet – Cousteau divers film close encounter.
This species is very rare for the North Sea; seen five times since 2003 in Dutch waters; never in the six centuries before 2003.
See video here (in Dutch).
See also here, with video.
Singing humpbacks: here.
Rare pictures of a humpback having a whale of a time as it migrates north: here.