This tutorial assumes that you have uploaded the video to your YouTube channel 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, use the Adding Caption Files to YouTube Videos tutorial. If you already have a transcription prepared as a .txt file, use the Making Captions from Transcripts in YouTube tutorial.
*Note: Refer to the Captioning Best Practices Checklist for guidance when creating your own captions.
You can 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. The audio signal is shown in grey behind the white text boxes to help find where the audio begins and ends. Hit Shift-Enter to add a line break; you should have no more than 2 lines of text in your captions. Try to split up your captions by complete phrases.