Your example is fine. You watched (past tense) the movie because that event happened yesterday, but the movie talks (present tense) because the movie, as a recording, will continue to talk to others.
This is often the idiomatic way to refer to recorded media, including the printed word. Just consider these quotes from book and record reviews:
- "... the gusto with which he sings those final two lines..."
- "On track number 7 he sings 'I believe I can fly'"
- "...in his own book he deals with a much longer period..."
This is idiomatic because you are not speaking about a past event, but the ongoing effect that the media in question will have on people. Of course, if you're talking about the event of making a movie, writing a book, recording a song, then you use the past tense:
- he sang in the studio
- he made the movie in Hollywood
- he wrote in his book...