Get the word times for a take you already have, so captions and cuts land on the word. Give it the recording (an asset id from your library, or an https link) and the script that is spoken in it, and every word comes back with the second it starts and the second it ends. Use this when you already know the words; use transcribe_audio when you do not. Send the script as plain spoken words with no speaker names in front of the lines, or the times come back wrong. Billed per minute of the recording (a charge applies). Nothing new is saved to your library.