YouTube captions are a great way to make your videos more accessible to viewers who are deaf or hard of hearing, or who speak a different language. They can also be helpful for viewers who are watching your videos in a noisy environment or who simply want to read along with the audio.
By default, YouTube captions appear below the video player. However, you can also overlap captions with the video itself. This can be useful for videos where the speaker is on-screen and you want the captions to be easy to read.