Ensure that the subtitle file name matches the video file name you have downloaded (e.g., HDRip, BRRip) to avoid audio-to-text synchronization issues. Media Players: If the subtitles are in format, use media players like VLC Media Player
If the Sinhala text appears too early or too late on your screen, you can manually fix the synchronization using keyboard shortcuts in your media player: Press H to delay the subtitles (if text appears too early). alex pandian 2013 sinhala subtitles