John Hopkins medicine states that teenagers need more sleep than younger kids. The claim in the subtitles match the content and data within the article page. The writer of the article cites experts like Laura Sterni, a sleep expert or a pediatrician, Michael Crocetti to back up the information. There are other valid sites like NIH and other universities posting similar claims as well. The writing in the article seems pretty balanced and I don't see bias. However, this article doesn't provide any information on when it was posted or when data was collected, which is important to provide to make sure the article is valid at this time.