Ahrex PR378 fly tying

Ahrex PR378 GB fly hook can be answer, the solution for a certain situations but it can be quite difficult hook to tie certain kind of flies. I have been trying multiple times to do good pike fly to it, without success. Finally I have find away to tie pike flies in this hook.
Ps i tested that fly in a pool and I recommend to add weight to a lower part of the hook. Not much but just keeping it in a right position.
Video is filmed with Panasonic S1h camera + Laowa 100mm macro lens + Panasonic S5 mark2 camera + Panasonic Lumix S Pro 70-200mm lens.
Microphones: Sennheiser MKE600 and Saramonic Blink 500 B2.
Warning: there is parts which are not suitable for a young children's.!