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This is... not a simple problem. If your ECU data monitor is not set up/capable of outputting that data, real time, you're out of luck. If it is, you'll need to find out what format it is in before anyone can help you.
As to 'data' from the quicktime movie, you'll need some pretty advanced computer vision stuff, those numbers aren't stored in the quicktime video as numbers, they're stored as pixels, which are much harder for a computer to try and convert back into 'data.'