Complex Content Type, modules? I've been trying to figure out how to create a content type "a course" that has title, description, duration, instrucor details and contains video lessons.
I made three different content types - courses, videos and instructors but couldn't figure it out how to relate it. I've been trying with View but if someone could suggest module/tips how-to would be much appreciated.

BR, Ivan Ivanov
Entity Reference 


  Provides a field type that can reference arbitrary entities:


To your course content type add new field of entity ref type and refer videos content type.
Add second field to your course ct and refer instructions content type.

When you create new course you will be able to select instructions and videos

Tutorial (simple)

Youtube tutorial