How to make a component with views displaying item

Hello, I estoiu trying to make a component of courses and am doing so:
1 table: Course name
1 table: Module name
1 table: Vídeo name

I'm using a foreign key to add video to the module, and using another entrangeira key to add the module to the course name. 
  The problem starts when the item Course I can view the module, but I can not see the videos. 
  What would be the best option to do this? 
  Thanks for listening!