changing youtube video

[Zbigniew Koziol]

You here were so kind to help me enormous number of times.

I met with this nice movie on youtube concerning science in general and 
thinking, close to philosophy:

http://www.youtube.com/watch?feature=player_embedded&list=PL25D581BA7A64EF48&v=JnWyPIzTOTw

Anyone could advise how to add subtitles there in another language?

Or, better, how to replace the sound track?

On Linux, of course.


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