the “H...” probably stands for (indicating dual audio: English + Hindi). It could also include the encoder group (e.g., Hon3y , HEVC , or H.264 explicitly).
But based on your partial text:
It looks like you're trying to reconstruct or identify a full file name for the 1999 film End of Days , starring Arnold Schwarzenegger. End.of.Days.1999.1080p.BluRay.x264.Dual.Audio.H...
A more complete plausible version:
End.of.Days.1999.1080p.BluRay.x264.Dual.Audio.ENG.AC3.5.1.-RARBG.mkv the “H
A typical full filename for that release might look like: End.of.Days.1999.1080p.BluRay.x264.Dual.Audio.H...
End.of.Days.1999.1080p.BluRay.x264.Dual.Audio.Hindi.English.AC3.5.1.-DDR.mkv Or if it's just English + commentary: