What are you remembering, exactly?

I made that assumption based on this text:

> So even if they understand how a machine’s PRNG functions, hackers would also have to analyze the machine’s gameplay to discern its pattern. That requires both time and substantial computing power

I would have guessed that the CPU requirements to process the video and map it against the PRNG characteristics would be a bit much for a smartphone, but given how powerful they are these days, that may well be flawed assumption.

I can't speak to the video processing (although with modern neural networks it seems it would be more than doable), but speaking from experience, brute forcing a 32-bit PRNG takes substantially less compute power than you might think...