Know which download you mean
An APK installs an application. An offline movie is a video copy supplied through a supported viewing app. A FilmPlus favourite stores a title reference. These are three separate things.
Prepare the film rather than just its page
When a viewing app offers offline access, select the exact title or episode and wait for its download to finish. Test the audio and caption tracks you intend to use before leaving your connection.
When offline is unavailable
An online offer does not guarantee a download option. Keep a different title ready for travel if the chosen service does not support saving that film on your device.
No automatic transfer from My List
Saving a favourite does not download video, install FilmPlus or back up another player’s history. The catalogue does not distribute a separate film-file archive.