Wherever a video originates from, the accent is unfamiliar to people from other parts of the world. So, it seems like a no-brainer that having subtitles would enhance the appeal of the video because more people would understand the video. I see it on the lines of optimizing a website so it works well across all the major browsers IE, Firefox, Chrome, Safari etc. Why do so few YouTube videos have subtitles then? Their automatic subtitles are ridiculous. Is there any technical limitation or restriction on YouTube that makes people reluctant to include them in their videos?