내용이었던

내용이었던

"내용이었던" means "content that was" or "content which used to be."

Here, '내용이었던' is used to describe the content of a book, referring to its interesting nature in the past.

그 책은 아주 흥미로운 내용이었던 것 같아요.

That book seemed to have very interesting content.

In this sentence, '내용이었던' refers to the subject matter that was previously addressed during a class, emphasizing its significance.

수업에서 다뤘던 내용이었던 주제는 중요한 논점이었어요.

The topic discussed in the class was an important point.

'내용이었던' here is applied to describe the educational content of a video that was assessed in a past context.

그 영상은 교육적으로 유익한 내용이었던 것으로 평가되었습니다.

The video was evaluated as having educationally beneficial content.