It's very predictable at this point that nearly everyone has the same videos, it feels like me trying to not plagiarize Wikipedia in middle school; "I'll change a word here, rephrase a sentence there, done!". Also true in many other content categories, everyone uses the same source material, same review units, same benchmarks, often the same editing style. I'd say it's a negative, but I've been watching less and less of it since noticing the pattern.