Build a RAG System From Scratch in Python (Part 1) | Embeddings & Semantic Search Explained

In this video, we build a RAG (Retrieval-Augmented Generation) system from scratch in Python — no LangChain, no LlamaIndex, no black boxes. Just clean, beginner-friendly code so you actually understand what's happening under the hood. RAG is the technique that lets you give an AI access to YOUR documents — PDFs, notes, knowledge bases — so it can answer questions about them accurately. If you're learning AI and Python, make sure to subscribe — I post tutorials, projects, and experiments as I learn and build in public.