One basic Query related to course videos

Hello,
I have one query related to the module which I have completed got certificate too.

But,I want to refer videos and study material for future reference also,so after few days/months/years the video & study materials or our course lab/homework exercise will remove or what? for both pass or fail students records and study material likes videos,quizz,lab etc.

kindly any one have any idea,revert it.

Thank you.