Seeking advice / opinion.

Im planning to make a software that helps learning any language from movies. Fairly simple to make. It will allow to watch a movie and enable/disable/change either subtitles and language and re-watch specific trunks easily. Design and creation is not a problem at all, what im not sure about is how to monetize the the whole thing. I already thought about Freemium, subscription plan, software fee, ADS, but none of those i think will work i suppose.
Any idea how i can monetize my idea?