Dive into the architecture and design of Memcached, an in-memory caching system, in this comprehensive video tutorial. Explore key concepts such as memory management, LRU (Least Recently Used) algorithm, threading, and connections. Learn about read and write operations, collision handling, and locking mechanisms. Discover how Memcached functions as a distributed cache and gain hands-on experience using Docker, Telnet, and NodeJS. Follow along with practical demonstrations, including setting up a Memcached Docker container, interacting via Telnet, and integrating Memcached with NodeJS applications. Conclude with a summary of Memcached's features, design choices, and potential use cases in database load optimization.