The video is entitled, “FLAT EARTH Erastosthenes DEBUNKED!”
Does that give you a clue?
In 2012, Anthony Abreu Mora repeated Eratosthenes’s calculation with more accurate data; the result was 40,074 km (24,901 mi), which is 66 km (41 mi) different (0.16%) from the currently accepted polar circumference of the Earth.
https://en.wikipedia.org/wiki/Eratosthenes