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1st: The PSP in the video is NOT a 3k (the "Home" button is actually labeled "Home" and not the PS logo)
2nd: he's just showing some JPGs that carry some text "Hello Fake!", what's so special about it?
There is NO exploit or any kind of unsigned code running, just the display of some JPGs, nothing more.
It's even bad made.
This is just another nobody seeking fake fame, don't believe everything you see on YouTube.... seriously!