Explore the intricacies of Hierarchical Navigable Small World (HNSW) graphs in this comprehensive video tutorial on vector similarity search. Delve into the foundations of HNSW, understand its inner workings, and learn how to implement it using Faiss in Python. Discover the basics of HNSW in Faiss, examine the process of building an HNSW graph, and gain insights into creating the optimal HNSW index. Fine-tune your HNSW implementation for enhanced performance in approximate nearest neighbors (ANN) searches. Demystify this popular and robust algorithm through easy-to-understand explanations and practical examples, equipping yourself with the knowledge to leverage HNSW's state-of-the-art performance and lightning-fast search speeds in your projects.