To find English subtitles, you would need to visit these sites and search using the video's catalog number ( SSPD-175 ). If an English version exists, it would be listed there.
Valid video files generally use formats like .mp4, .mkv, or .avi. If a website prompts you to download an .exe, .dmg, or .zip file to watch the video, block the site immediately. These are almost always viruses or ransomware disguised as video players.
Open the .srt file in Notepad, click "Save As", and change the Encoding dropdown at the bottom to . Subtitles won't load at all File corruption or unsupported format.