Quote:
Originally Posted by quantum-x
What's to say a checksum isn't a summary of the video? ID 1 frame every second with certain variables (brightness / hue / highlights over a 5x5 grid of the video).
When a new video is processed / uploaded on the sites, you run a quick check against the summary checksum hash, and bingo.
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Even then, the checksum would/could change every time the video is encoded.