This Monty Hall Paradox is counter-intuitive. You're likely to win money betting on it with friends, a win-win because it'll teach them to look for relationships and earn you money.
Basically, get yourself three cards and another person. One should represent the dream job and the other two can represent your unemployment check. One person should play game show host, the other contestant. After the person chooses one card, lift up one of the cards she didn't choose - showing her the unemployment check. Now, ask her if she'd like to switch from the first card she picked to the one you didn't turn over.
This simulation is set up to allow a group of people to choose whether they will always stay with their first choice, always switch, or flip a coin to decide whether or not to switch. The narration in the video assumes that you've done this and run 20 simulations testing each rule, or scenario. Note that the most common belief - the , it doesn't matter so I'll flip a coin belief - actually falls into the category of self-fulfilling prophecy. If you flip a coin, you really do get 50-50 results. But if you challenge what you think you know, you'll probably learn something new.