Here is a YouTube video about Gerald Youngblood K5SDR on Direct Sampling and Benefits of the Architecture, and is part of a growing collection of videos I have found to be useful. The reason is how direct sampling has benefits for SDR radios and understanding science related to software defined radio.
This tutorial, "Gerald Youngblood K5SDR on Direct Sampling and Benefits of the Architecture" is free education you can watch, which will help you deepen your knowledge and be better prepared for licence exams, schoolwork, or operating radio equipment.