Yellow part and violet disk are jointed with brown part by crimping.
The brown part is fixed to the base.
Transparent disk represents the yellow part before crimping.
Blue shank is fixed to grey spindle.
Green core can move up-down in the shank hole. Blue cross pin acts as a stopper for the core.
When the tool rotates and moves down, four pink jaws bend the yellow part to create the assembly.
The video last scene shows how the tool works supposing that the spindle doesn’t rotate.