Yes but the video shows a menu that all the games have serial number, location, clock cycle etc set - if there is a secret menu then it would be simple to hack.You will find this wont be that easy to hack/crack.
On SAM sterns you used to have to install a small board on top of the main PCB to get rid of the 50/60hz region lock.
It was and still is a way to stop grey imports.
There are no secret menus on a bally/williams as they worked around the world after you changed the transformer links, varistor and main fuse.
Could be a Chinese whispers story.Unlikely if a story I read in the past was accurate. A US Soldier was stationed in europe and he had his collection of Stern machines shipped over. Refusing to pay for new machines etc Stern changed the programming in them to work.