This tutorial assumes that you have a YouTube account and that you do not already have a written transcript of the audio from your video. If you have an .srt file that you need to synchronize with your video, see our Adding Caption Files to YouTube Videos tutorial instead. If you already have a transcript, see our Making Captions from Transcripts in YouTube. If you would like to transcribe the captions yourself rather than improving the auto-generated captions from YouTube, use our Creating Captions in YouTube from Scratch.
*Note: YouTube auto-generated captions that have not been corrected by a human are insufficient. Steps 5-8 in this tutorial tell you how to correct the automatic captions. The accuracy level of YouTube captions is typically below accepted standards for accuracy. If you intend to use the following approach, you must extensively review the auto-generated captions to ensure that there are no remaining errors.
Go to your YouTube Studio after your video has been uploaded to your YouTube channel.
*Note: You may see what is called the YouTube Creator Studio Classic view rather than the new YouTube Studio. Use these instructions on switching between the two views (this tutorial assumes you are in YouTube Studio).
You can also adjust the start and end times of each caption at the bottom of the screen by clicking & dragging on the edges of the white boxes with text. The audio signal is shown in grey behind the white text boxes to help find where audio begins and ends.
Try to divide your caption blocks at the start or end of complete phrases so that users don’t have to retain detailed information across caption blocks.