This is the 12140th most frequent Spanish word.
interesaron
"Interesaron" means "they interested" or "you (plural) interested" in English.
In this sentence, 'interesaron' expresses how the documentaries engaged the attention and curiosity of the speaker.
Los documentales históricos me interesaron desde el principio.
The historical documentaries interested me from the start.
Here, 'interesaron' is used as the third-person plural preterite form of 'interesar', meaning 'to interest'. It refers to the subjects drawing positive attention.
Los temas que discutiste en la reunión interesaron mucho a los asistentes.
The topics you discussed in the meeting were very interesting to the attendees.
Here, 'interesaron' describes the proposals that caught the attention or sparked interest among the young demographic.