Press and release the yellow button to rotate the violet blade 180 degrees.
A special feature is that the blade rotates clockwise and counterclockwise in turn (not in the same rotary direction).
The red pin is forced toward the inner barrel cam by a spring (in pink).
The blade rotates during the upward movement of the yellow button under the red spring action. Such fast movement helps the blue pin pass through the Xshaped groove of the cam.
It should be noted that the depth of the cam groove is different. In the last scene of the video: brown corresponds to the deepest place, yellow: the shallowest place. The depth change ensures that the green pin moves in right direction.

STEP files of this video:
https://www.mediafire.com/file/bydwv9...
Inventor files of this video:
https://www.mediafire.com/file/2l31gg...