Not picking on any brands, but an example which might clarify the observations in the video comes to mind. I have been in quite a selection of Pioneer and Sansui units, among others. I've also been in a good representation of Kenwood units. I've often commented within discussion circles that the Kennys seem like a box of air compared to other units. They kept the costs and component counts down, and it shows. However, in order to make things work (and work pretty well) with that minimal hardware reveals that the engineers at Kenwood/Trio seemed to have spent a lot more time with design in order to make a "minimalistic" unit work as well and reliably as it does 40+ years later.
Conversely (and the followers who are realistic would probably agree), Sansui threw in a greater number of components, used some more apparently robust (or better looking) devices like transformers with shielding and higher board counts to segregate sections, and so on. They look better inside, but there are some pretty painfully obvious examples across the lineup that seem to reveal a bit less homework in the engineering department. There are no fusible ("band-aid") resistors in Kennys, yet Sansui used them like napkins to clean up the mess. There are a lot more revision versions in Sansuis. And others have similar issues, like Pioneer seeming to forget about heat dissipation in power supplies, Marantz apparently being unable to use the same components for more than a week, Yamaha forgetting to use solder, etc.
None of that means that any of them are good or bad, or better or worse. The fact that so many are still plugging along, and some in completely original trim, is an achievement. But they ARE different and display slightly different characteristics and/or philosophies in design.
