You can enable Universal Subtitles on your video in less than one minute, here’s how:

Step 1: Take an existing video
Copy the URL for an existing video that you have on the web.
Compatible formats & services include .mp4, .ogv, .webm, .flv, YouTube, Vimeo, Blip.tv, Dailymotion, and we’re always adding more.
Step 2: Add to Universal Subtitles
Paste your URL into the subtitle a video page.
Note You can skip this step by pasting your video URL directly into the embed code below.
Step 3: Get embed code
You will land on the video’s subtitles homepage. This page has embed code that can be easily copied and pasted. The page also gives you access to a list of languages and how complete they are, subtitle import and export, a full record of all changes ever made to any of the subtitles, and more. Here’s an example of a video’s subtitle homepage.
<script type="text/javascript" src="http://s3.www.universalsubtitles.org/embed.js">
(
{"base_state": {}, "video_url": "http://yourURL.com/specific-video"}
)
</script>
Step 4: Embed it & you’re done
Now you just embed the video and viewers will be able to use, add, and improve subtitles.
We’re starting to strongly encourage organizations and individuals to begin adding subtitling capabilities to their videos. Please let us know about any experiments you do (in the comments or via email).
Want to add “Subtitle Me” tabs to every video on your site?
In the coming weeks, we’ll release a script that you can add to your website’s <header> template and will enable Universal Subtitles for every video on your site. We’ll be blogging about that here.
Will there ever be a way you can subtitle YouTube videos that don’t allow embedding?
@Soincfunt
Possibly, if YouTube were to enable it or allow the owner of the video to do so.