If you know how to download the video from YouTube, then you may like to download the automatic captions (in English) as the subtitle. The automatic captions unlike the “closed captions”, “closed captions” can be downloaded using the userscript such as Download YouTube Captions. With the script, we can download the captions as the .srt subtitle format.

However, automatic captions is different. It is created by YouTube based on speech recognition, thus the captions are not very accurate. But I personally feel that it may be a little useful. Therefore, I have done some scripting to solve the problem semi-manually. Semi-manual is because the preparation of the subtitle have to do it manually. I do not spend time to write a userscript to solve it.