Notice the leg position in the videos. Some of these guys are casting with an open stance as opposed to casting with the same leg forward as the top hand.
Now compare it with this Speyorama Caster with the same leg forward as the top hand. I know who this is but I have a brain freeze going on right now.
Amazing caster and casting. The water is deeper but he is tall enough that you can see his leg position.

He is Vidar Naess and he was 7th in 15’1” and also 7th in 18′ Spey in World Championships so first who did not make to the finals.
Thanks Esa! He sure handles that 15′ Comp rod like its a switch rod!