The "A..." likely stands for the release group (e.g., AMZN for Amazon or Anoxmous ). Subtitle Compatibility & Sourcing
Lists various release tags, including GECKOS and YIFY, which are often cross-compatible with general WEBRips. Usage Recommendation subtitle Magic.Mike.XXL.2015.720p.WEBRip.x264.A...
If you are using a media player like VLC Media Player or MPC-HC , you can typically right-click the video while it's playing and select once you have downloaded the .srt file. If the text is slightly out of sync, use the 'H' and 'J' keys in VLC to adjust the delay manually. The "A