narration

US /nerˈeɪ.ʃən/
UK /nerˈeɪ.ʃən/
"narration" picture
1.

the act or process of narrating a story or an account of events

:
The documentary used a clear and concise narration to explain complex topics.
Her engaging narration kept the audience captivated throughout the presentation.
2.

a commentary delivered to accompany a movie, broadcast, etc.

:
The film included a powerful narration by a famous actor.
The nature documentary featured stunning visuals and an informative narration.