Here’s a concise review of the subtitle file you’re referring to:
Subtitles are time-coded. An HDTV release might have commercials cut differently, or a WEB-DL might have a few seconds of black screen at the start that a BluRay rip does not. To get subtitles that sync perfectly with the video, you must match the subtitles to the specific release group (Shaanig) and source (BluRay). Game.of.thrones.season.4.720p.bluray.x264-shaanig Subtitles
Some shaanig releases include isolated commentary audio (e.g., from David Benioff, D.B. Weiss, and the cast). Separate commentary subtitles exist but are rarer. Check dedicated forums. Here’s a concise review of the subtitle file
(SubRip) format, which is widely supported by media players like VLC Media Player Key Subtitle Requirements for Season 4 from David Benioff