A possible concise summary is:
Two brothers, Preston and Josh, play a Fortnite challenge where Josh has to use only green weapons and items based on his skin color. They comment on Josh's skills, the game features, their fans and other topics while Josh tries to win 100,000 v-bucks. Josh fails the challenge after getting killed by an Aquaman skin and gets default danced on.
Here are the key facts extracted from the text:
1. Josh is attempting the rainbow marble skin challenge in Fortnite and can win 100 000 v bucks if successful.
2. He has to use weapons and meds of the same rarity as the skin he gets.
3. He switches from mouse and keyboard to controller and plays well with green weapons.
4. Preston shows off a Fortnite drop package with a bunch of loot inside that he got from a fan named Sam.
5. Josh gets killed by a default skin and loses the challenge.