If they prefer free options legally, maybe YouTube or other platforms have official uploads. But often, free legal sources are limited. If they can't find it there, I should guide them to official channels where they can purchase or rent the movie.
In summary, provide options for legal streaming services, mention purchasing or renting, suggest checking subtitle availability on those platforms, and maybe recommend using OpenSubtitles if they own the movie legally. Avoid any illegal links and offer to help find the movie without sub indo if needed, in case they have access to another language option.
Additionally, maybe they're interested in sub indo because they're learning Indonesian or watching with others. So, I can mention using platforms that allow adding subtitles or using subtitle websites like OpenSubtitles, but again, ensuring it's within legal boundaries.