I'm not expert too but I have few thoughts.
I tried to look at some miniatures where we can see shamshir in use and I couldn't find hooking thrust on any of them - but these were only few miniatures and it doesn't make a case!
I think that nobody will claim you can't use this weapon for such hooking thrust. But please answer few questions:
- which blows are more efficient?
- which blows are easier to make?
and you'll have an answer what for the weapon was intended.
Well, you can always use (for example) a small-sword for cuts althought it was intended to thrust, and any weapon has many ways of use, but the only one is the best
, I think.
But your video looks quite convincingly