Epictronics owns a machine almost nobody can name: a late-1980s IBM prototype, the IBM 7496 Executive Workstation, with its monitor permanently mounted on a swivel arm.1 The case is gorgeous. The machine itself did not work.
The video is a teardown doubled with a repair.2 The first job is the 720K double-density floppy drive, which has accumulated several faults. Rather than fight to run everything from floppies, Epictronics adds an XT-IDE card to hook up a real hard drive, then an AdLib clone sound card.1
The unit carries a rare, short-lived graphics subsystem, MCGA, which fits its prototype nature.1 By the end it runs a fair number of games from its era.
What makes the video interesting is not the object's rarity. It is how the repair moves: nothing is restored to factory spec, everything is a user's choice. A hard drive instead of floppies, a sound card grafted on. Restoration here means deciding what the machine should become again, not just making it hum quieter.
For anyone who likes old computing, it is a useful reminder: a rare prototype is first of all a machine you can still understand piece by piece.