Replace videotestsrc with Playbin as video Source?

[Stefano D. Mtangoo]

I have a code that uses videotestsrc as video source. Now I want to 
read from file and play it with Playbin2.
My code used video overly with external Window (wxPanel).
How do  I do that?
Code can be seen here--> http://pastebin.com/pTHi9UAe
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