If you already have the video file and need to add subtitles:
Most modern media players (like VLC) allow you to right-click the video, go to the "Subtitles" track, and "Add Subtitle File" once you have downloaded the Greek .srt. If you already have the video file and
Searching for with Greek subtitles (Υπότιτλοι Ελληνικά) typically refers to one of two cult-classic productions: the 1978 neo-noir film starring Ryan O'Neal or the 2014 BBC crime drama miniseries. The Driver (1978) go to the "Subtitles" track