Each type of media has its strengths and limitations. A live television report from the scene of a war provides immediate, direct coverage with emotional impact but may lack depth, accuracy, and context. A book written about a war offers comprehensive analysis, contextual background, and reliable information, but it does not have the immediacy or urgency of live reporting.
Thus, which is "true" depends on the context and what you seek from the information source. Each has its role in conveying different aspects of a story or event.