The video may be foreshortening the perspective. The pilot can see what we see and at least the same ahead of the aircraft, which was clearly enough to execute a CAT A take-off profile. Only seeing it from the lens perspective I would also have considered a helipad profile with a 35ft TDP. But as Sir Korsky said, the attitude change may have been unappreciated by the occupants of the cabin on this flight. And the pilot saw what they saw, flew the profile and was clearly at take off safety speed whilst still visible.
The aircraft is being flown by hand weemonkey. The attitude changes are entirely due to pilot inputs to the cyclic probably until just about when they disappear. At that point the pilot would surely have engaged some upper modes on the AFCS.