Streamer in Another World

A small streamer tried a challenge to get views but it's too extreme and reckless that he died. Waking up, he's in another world with his phone and he was inside an abandoned warehouse with a PC?! Soon enough, he found out the world he was in was in truth a video game he never heard of. Gacha, hero, princess, knight, quests, alien attacking the earth and demons allied with it. That was the world he was in. It was pretty chaotic as the half of the world had been ruled by aliens and demons, but at least he could stream and that appear in his previous world. "What would the world's reaction upon finding out magic and swords and also reincarnation exist?"