The video starts out well and keeps getting more insane as it goes on.
Rachel wants to sell her little brother because "something in him is wrong." She speculates that they could get a good price for him at the pet store and already has ideas of what she could buy with the money.
Then Rachel lays out a complicated investment scheme that sounds like a combination of short selling and house flipping. Once she's explained that to dad, it's time to sell her brother on the idea.