Let’s say that you watched a movie yesterday and you liked it, you found it interesting, what did do after that?
Maybe drink a bear and going to sleep.
Sleep helps memory to fix the information, but you will forget the big part of the movie, after 2-3 weeks probably you will not remember in the big part the content (this happens to me).
If you want to try to help others, try to write some ideas about that movie.
Anyone today can make a blog in minutes, even without buying hosting and a domain name, even if this two thing are cheap for most people.
That ideas most probably will be read in the future by people, even if they are not many and if the blog post will survive time test (will not be closed by you or the hosting company that offer space for the blog), will be analyzed in the future by some artificial intelligence programs and extract useful information’s from it.
If a movie is bad you will help people to avoid losing time with a bad movie.