I listened for the first bit that kinda made sense: don't pour boiling water straight from the kettle, leave it for a moment because extraction vs temperature. I tuned them out when it transpired they made a 30-minute ritual out of pouring hot water on beans. Also, anyone who insists you can't have cappuccino after whatever hour is automatically disqualified. It's like listening to people with opinion on fonts or cuts of jeans: I get there's a difference, but as long as they're readable/don't look like celibacy aid bought by your mother... it basically doesn't matter to me.

My method is to just straight up pour a half a cup of boiling water onto some ground beans I like, and then dump some instant coffee into it. After giving it about five minutes, I pour cold water to s̶t̶o̶p̶ t̶h̶e̶ s̶o̶l̶u̶b̶i̶l̶i̶t̶y̶ o̶f̶ a̶c̶r̶y̶l̶o̶g̶a̶r̶g̶a̶m̶e̶l̶o̶o̶g̶a̶b̶o̶o̶g̶a̶s̶ so that I can have it in a drinking temperature faster. That way I get complimentary tastes I like, get to drinking almost instantly, and also don't use as many (pretty expensive I might add) coffee beans.