The bathroom at the end of the video is definitely not ADA compliant.
The buck-boost circuit. Judging by the size of the transformer it could probably step the voltage up or down by 10% at 4500W. So 80V to 260V seems a bit optimistic.
There is a computer, the person building it.I haven't had any interest in building clocks in probably 50 years or so, but I actually like the steampunk look of this: