Last time I saw Youtube's automatic subtitling, it was rubbish, and if Google hasn't got this solved, I doubt anyone has. Lectures are also likely to include so

Last time I saw Youtube's automatic subtitling, it was rubbish, and if Google hasn't got this solved, I doubt anyone has. Lectures are also likely to include some less common, discipline specific words, and to be hard to follow if the transcription doesn't record those accurately. So I can totally imagine that manual subtitling is necessary to meet the required standard.