Captions can be open (overlaid on video, can't be turned on/off) or closed (separate file from the video, can be turned on/off). Automatic captions tend to be inaccurate and don't include speaker identification or punctuation. Captions must be:
- Reviewed by a human
- Synchronized with the video
- Be at 99% accuracy
- Use capitization and punctiation
- Include unpsoken information (music, sound effects, speaker identification)
Make sure live videos are captioned.