Robotic Rename is a program for Mac that helps you change the name of subtitles to match the filenames of their correspondent videos. This application might prove to be of good use when dealing with a movie playlist and you need the video player to load the subtitles automatically when a film starts playing.
You have access to an easy-to-use interface which also features the ability to drag-and-drop the necessary files onto the app's interface, and you can preview the results before exporting them.
Still, you can simply drag-and-drop the subtitles onto the video players and enjoy watching your movie. This procedure works with plenty of popular film players and without the need to install third-party apps to rename subtitles to match the video titles.
In my opinion, this program comes in handy to users who are too lazy to drag-and-drop the subtitles onto the video players and enjoy watching their movies. Nevertheless, the app is free of charge and brings an intuitive interface, so I can't find any reason why you shouldn't give it a try.