As an experienced developer and professional engineer, I may not have the exact skills listed for this project, but you'll be pleased with my adaptability and commitment to providing excellent results. Alongside my expertise in Node.js, Angular, React.js, Python, RPA and robotics, I also possess a deep understanding of Onshape software that I have successfully utilized to design complex structures efficiently.
Throughout my career, I've specialized in creating systems that require precise measurements and calculated movements. The manipulator design you're seeking aligns perfectly with the demanding engineering projects I've successfully accomplished; be it using rotary joints effectively or integrating pick and place functions optimally. Further, with my strong grip on animations and videos combined with your requirement of demonstrating every joint functioning clearly in a video format — you can rest assured that your vision will transform into reality exactly as envisaged.