YouTube already took care of that a while back. The video is flagged as 18+ even though it’s for educational purposes. They also added a small notification to the video which clearly tells you that it’s age restricted.
I must say however that I consider the video definitely safe for work. It’s a digital representation of a humanoid character that in no way tries to arouse the viewers sexually. It just displays the use of a material with logically assigned masking properties. Other than that it’s just a person, standing.
If your co-workers are not okay with it they are in my opinion far too prudish for their own good.
Cheers.