i just used @quedtv to subtitle Jean Luc M̩lenchon MEP video to English on YouTube Рthis is the HowTo

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import video to http://qued.tv
like
http://qued.tv/29132add your cuepoints and English translationat the bottom of the online editor click SBV to download a SBV file of the captions / subtitlessample
http://qued.tv/subs/29132.sbv.txt
(txt ext. so server will display to you as readable text)

Then go to YouTube video / edit / captions and add the SBV file.

Now captions are attached to the video forever, but they don’t default to captions for video viewers.

In order to force captions on add
&cc_load_policy=1&hl=en_GB

to the params of the video. a tip i picked up here http://idratherbewriting.com/2010/07/08/showing-youtube-captions-by-default-in-another-language/

and here is a working example

http://qued.tv/subs/non.html

in order to try this you may need a (free) qued.tv account which i can set you up with. email me passion AT qued.tv

tnx to Jimmy for the edit / translation.