- Auto-generated tracks cover far more videos than hand-made ones.
- They drop punctuation and mishear names, slang and fast speech.
- Use them on clear speech, and prefer a hand-made track when one exists.
What auto-generated subtitles are
YouTube runs speech recognition on the audio and turns it into a track marked auto-generated. It appears on many videos that have no hand-made subtitles.
The text often arrives as two rolling lines without full sentences. That makes it harder to read than a track written by a person.
Where they go wrong
Names, slang, music and people talking over each other cause most errors. A learner cannot always tell a misheard word from a new one.
Reading research puts comfortable understanding at about 98% known words. A few wrong words per minute can push a video below that line.
When they are good enough
Swaps work on them too
NativeLingo follows the track you choose, including auto-generated ones, and shows both lines as YouTube does. A hand-made track still gives cleaner swaps, so pick it when there is one.
Questions
The track name in the gear menu says auto-generated.
For clear speech, usually yes. For noisy videos, wrong words can confuse more than they help.
No, only the channel owner can edit them.