This toy is an example to get oscillation around 45 deg. oblique axis from a gravity pendulum.
Thanks to a spherical mechanism (blue shaft and yellow horizontal shaft) the oscillation from yellow pendulum is transferred to blue oblique shaft.
Rotary axis of the blue shaft, axis of blue pin on the blue shaft and rotary axis of the yellow shaft are convergent.
Joint between blue and yellow shafts is of cylinder on plane like in video