: Desktop players like VLC or MPC-HC allow you to simply drag and drop the subtitle file onto the video while it's playing.
: If the text doesn't match the speech, you can use the Subtitle Finder & Downloader app or online tools like Clideo to manually adjust the offset. Add Subtitles to Video — Online & Free - Clideo
: Highly popular for user-rated subtitles, often including "SDH" (Subtitles for the Deaf and Hard-of-Hearing) and multiple language options.