3D Animator

we are a Industrial Machine Manufacturer & we are looking for freelancer for 3d animation for marketing like below;
https://www.dropbox.com/s/zh98b0i98mkc8xy/4%20axis%20palletizer%20animation.mp4?dl=0

Note: it will be long term work one project after another

Here is the skill test:
(candidate who submit this test will only be considered for the job)

Create a 3d animation of this machine with your (candidates) Name of on machine with rigging texturing & rendering (This is to prevent copy-paste online video)

3d file: https://grabcad.com/library/cartoon-box-palletizing-1

You can download .stp file of machine from this link.

Reference animation ( initial 10 sec would be enough)
https://www.dropbox.com/s/zh98b0i98mkc8xy/4%20axis%20palletizer%20animation.mp4?dl=0

Actual reference video for understanding : 4 Axis Palletizer - YouTube
https://www.youtube.com/watch?v=4rTksnS7Ys4

P.S. work will be same as this test we have existing machine design on which we want to create animation for marketing purpose