The video itself is modest. In soft afternoon light, a middle-aged man sits at a kitchen table. There is a kettle on the stove, a stack of battered notebooks to one side, and a battered screwdriver near his elbow. He speaks slowly so a camera—set by a cautious, somewhat shy hand—can catch each movement. The son who saved the file imagined immortality as easily as anyone saves a copy: with a click, the lesson persisted beyond the house, beyond the day when hands begin to tremble.