srt file into your video file if that appeals. By adding '.en' just before the file extension it tells your video player that the subtitles are in English. srt file in the same directory as the video file and VLC, Plex, or similar video player will load them into your video non-destructively. Unless you need to burn in the subtitle, which you might I don't know your situation, I would not and just place the. The good news is you can convert them to SubRip format. ass/.ssa extension… is a subtitle format that is not compatible with most video containers. Advanced Sub Station Alpha subtitle format… or the.