Now, there are lots of good comments that others have made already. I think the most important ones are the issues with the speed of taking orders and the suggestion to talk to local restaurants and bars for input.
My two cents are related to the video. It looks too amateurish. The camera is not 100% steady (use a tripod, or set the camera on a table), the narration is not very fluid (practice, practice, practice) and it's too technical. The video should target your audience and highlight the advantage of using your system. Show a waiter taking orders, and the kitchen receiving them instantly. Show how a fast and easy it is to print receipts and how a manager can help resolve customer issues/complaints. How would you convince a restaurant owner to ditch the multi-thousand $$ POS system that he/she has, and invest in yours?
Also your FAQ page seems to be outdated and missing a few links.
Good luck!