[satiric]

One way to tell that a video isn't worth my time is if after the intro they say "To tell this story, we need to go back to 1724" or whatever. If they're going way back in time to explain a modern concept, they're often just doing it to pad the runtime. Obviously doesn't work for all topics; like I expect a history video about the american revolution to go back to at least the mid 1700s.