In that case I can answer, though it might not be what you’re looking for. When I need a srt for something I do a web search for the title and where it came from, one of a couple sites show up in the results and then it’s just a matter of matching what you have with what you’re needing.
I’m being vague and not linking anything on purpose but it’s enough to go off of. It’s not automatic but it works for my purpose.
Make a best guess and run it on a (renamed) copy of the video. If it tries to redownload 100% of it then it isn’t the right one. It’s a little tedious but it’ll work.
In my experience downloading completely legitimate Linux ISOs and nothing considered illegal ever in my life, you have to add the torrent and start it so it gets peers and creates the files, then pause it and replace the file you’re working on renaming it as needed, then run the rescan. You’ll know a couple minutes later if it’s the right one.
motionpictures.org