get Coursera video download link via program

[iMath]

I want extract Coursera video download link via program(mainly Python) behind those links

https://www.coursera.org/learn/human-computer-interaction/lecture/s4rFQ/the-interaction-design-specialization

https://www.coursera.org/learn/calculus1/lecture/IYGhT/why-is-calculus-going-to-be-so-much-fun

After red a lot of articles about this, still cannot find a way to extract the video download link via program, anyone can offer a step by step solution of extracting the video download link ? Thanks!

P.S. I know this project ,
https://github.com/coursera-dl/coursera
 but the code is so complex , so I dropped out.