A caption file is a completely separate file from a video file. Caption files can be made in a wide variety of formats, and you can upload a caption file to accompany a video in order to create closed ...

The SRT Open Source Project, the fastest growing open source video streaming movement, announced wide adoption of the SRT open source video transport protocol and technology stack with VLC, GStreamer ...

That being said, Twitter can reject your file with a less-than-helpful message of: "There was a problem uploading your subtitle (.srt) file." So it's important, at least when you first start, to ...