You said you were "having trouble getting it out there and finding outlets to promote the video…" Are you talking about media outlets in general? If so, I can tell you from media experience that they will not promote a business for free. Media outlets are in the business to make a profit. Unless you are a nonprofit, I highly doubt they will touch it.
Also, asking others to help promote a business for free is a tough sell, unless that restaurant does a trade off. You are better off using YouTube for advertisement.
I would advise that the restaurant do a trade off (free meals for two, $50 gift card or certificates) to people who promote their business. Since the restaurant is located in Baltimore you are better off asking the locals. This way they can use the free meals or gift cards from the restaurant.