Hi,

this should be a simple question, but somehow google failed me: what are
you using to caption videos (obviously with standard-compliant captions)
manually, i.e. using an existing transcript.
Ideally, I'd like something similar to YouTube's caption editor, but we'd
like to avoid uploading the video to a third-party service. Video and
transcript are in Arabic (and we do have an Arabic speaker to work on
this), so I'm not having high hopes for anything automated to match the
transcript, which is fine.

Thanks so much!
Sebastian

-- 
Sebastian Karcher, PhD
www.sebastiankarcher.com