How to play animation on character with model?

Hi,

I have had an animation created for my game but I am unsure of how to actually play it on the character as the animation contains a model. Its kinda hard to explain what I am trying to do so I will include some videos.

This is what the animation is supposed to look like:
Video

And this is what it looks like when you play it on the character:
Video

I have tried to weld the model to the characters hand but that does not work as it just results in this.

Any help would be greatly appreciated.

Bump, I have still not found a solution for this.