I saw a video on youtube about the history of the Super Mario 64 Any% Speedrun world record:

About 11:29 of that video, he mentions a cheater who was caught in 2017 splicing together multiple runs by making hard cuts whenever the screen was faded to either black or white.

Is there a webpage out there that explains in detail how this splicing was uncovered? Because if the screen is solid white or solid black, I can't imagine how you would find evidence of any cuts.

Loading times on official hardware are known and (usually) consistent, so you can check if it's dark for the correct number of frames.

I’m pretty sure audio discrepancies also contributed to the discovery.

https://docs.google.com/document/d/1rnNAlPztsCP5OLK4pBBuqLQIQnB990uP6oG8DWz1Yxs/edit if you want an example of how splices can be detected