Yes the keyboard will play louder as you press harder. So its touch sensitive. It does not have weighted keys. The volume in the video is a bit low because the volume on the keyboard was low. Also I find that the left hand keys alway come out louder, regardless of the pressure, in some pieces ( maybe all?)especially when the volume is low. It's very old ( over 16 years!) and my parents are amazed it still works at all because it has had ALOT of use over the years. If it has a few quirks we write it off to old age

I havnt even tried to turn that feature off because it doesn't seem to bother any of the kids and I can play to accommodate it if I need to.
Can the weighted keys ( not the touch sensitive bit) of a digital piano be turned off or are they a mechanical addition?