This video shows the build and test of a Softrock Lite II software defined radio (SDR) kit.
A short tutorial is given on each sub-circuit as it is being built and systematically tested. Details of the assembly process are shown, as well as live test results.
The completed kit is then hooked up to a dipole antenna and a PC, and some CW signals are demodulated off the air.
People are watching (and learning from) on-line video far more than they probably realise - until someone points it out.