The video gives an example of performing simple component testing using a curve tracer or “Circuit Octopus” and an oscilloscope. It describes the Octopus, then delves into how to check resistors, ...

And as he intended to use it as an oscilloscope accessory, the analog output suited the application nicely. A pair of precision op-amps provide the voltage output scaled to 100 mV/A.

By using a very nice DPO7104 oscilloscope and a signal generator, he shows how the signal reflects on the line at various points, adding and subtracting from it.