High-frequency trading (HFT) is a fast-paced domain where algorithms execute trades at lightning speed, capitalizing on minuscule market inefficiencies. While C++ reigns supreme in this arena, Bryan Downing's video explores the viability of using C, the granddaddy of many programming languages, for building HFT systems. This article delves into the video's insights, analyzing the pros and cons of C for HFT and exploring the key concepts covered.