How to set up page logic for course platform?

I’m a bit confused about the page logic here, can anyone point me in the right direction?

1. I have a grid that’s loading courses from the database
   Now when I press the ‘Go somewhere’ button
   

   image681×705 123 KB

I want it to take me to `/watch/{course_id}’ just like for example Netflix does

Q1: How do I give the course ID to the next page using the button?

2. When on the /watch/{course_id} page I will show a sidebar with each individual lecture.
   Pressing a lecture should load the video in the right side of the page and set the URL to /watch/{course_id}/lectures/{lecture_id}

Q2: How do I give the lecture ID variable to the contents of the page on the right (server side include? a partial?) and then rewrite the URL with it?

I’m struggling with the logic a bit, so far I think I need to use the NodeJS URL rewriting doc… but how do I piece it all together?

Thanks in advance!