How to get Data from a Flash Player Videostream

Hi, i want to build a tool which autoplays the next video, as soon as the current video is finished.
Therefor i thought, it should be somehow possible to get some data from a flash-video-stream in my browser, but i couldnt find something useful...
For my needs it would be enough to get a response if the video is buffering or if its finished playing, that i can process with a script.
Maybe you can give me a hint...

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