Questions & Answers about Я записал название фильма в блокнот.
Because записал means wrote down / noted down, not just was writing or wrote in a general sense.
- писать = to write
- записать = to write something down, to make a note of it
So in this sentence, the speaker is not talking about the general activity of writing, but about recording specific information: the film title.
Also, записал is perfective, so it presents the action as completed.
In this verb, за- helps form the verb записать, which means to write down / record / note.
It is not always possible to translate Russian prefixes with one simple English word, but here the whole verb записать has the meaning of putting information into written form so you don’t forget it.
A useful pair is:
- записывать = imperfective, to be writing down / to write down regularly
- записать = perfective, to write down successfully / to finish writing down
So:
- Я записывал название фильма. = I was writing down the film title / I used to write down film titles.
- Я записал название фильма. = I wrote down the film title.