who the hell is duc? :enbyfied: :verifiedcat: (@duc)

is there a tool using which i can search for subtitles in video files in a folder (preferably recursively)? if they're as subtitle files, most indexing tools should work, but if it's in mkv format (as an example), i don't think that yields results.
and if i don't know when something was said in a show, it'd be cool to be able to find that.