Wasteland: Start with a Short Video

Wasteland, evil beasts, steel walls, human evolvers, polluters, hunters, angels... None of this matters. What matters is that the protagonist is here. He traveled through time and became the direct heir of the super group inside the steel city wall. He could not return to the city and could only survive in the wilderness. There is obviously a system that neither allows him to upgrade nor summon heroes, and can only be used to shoot short videos. Wang Er then decided to become a famous up master.