Obviously, you ain't the only one.
Here's the scam: The owner of the restaurant or, at the very least, one of its agents, staged the event to bring awareness to the restaurant via a hopeful to-go-viral video depicting euphoria upon the staff learning that it had won the lotto jackpot. The YouTube channel is new, and upon viewing the uploads, one can easily see that the event was staged, again for the sole purpose of bringing awareness to the establishment.
Here's the rub: Would you now trust frequenting the place and having the staff serve you food after they've been caught lying about a lotto winning? If they're willing to lie about this big event, are they also lying about washing their hands after going to the bathroom prior to preparing and serving you your order?