When making a video for a restaurant, or any business for that matter, think about what your customers are looking for when they enter your establishment. If you own a restaurant, most likely they are coming to your restaurant to eat. When writing your script, focus on what makes your cuisine unique, how it is prepared, and what types of local food sources you use if any.
Food should be the primary focus of your video because that is what your customers are coming for, and will keep them coming back. Atmosphere is also important, but should compliment the cuisine and complete the dining experience.