An old memory just popped up > The Wadsworth Constant is the idea (and 2011 meme) that one can safely skip past the first 30 percent of any YouTube video without missing any important content. https://www.dictionary.com/e/pop-culture/the-wadsworth-const...

The funniest part of that meme is that YouTube implemented a (now obviously removed) "wadsworth" query parameter that skipped the first 30% of a video.