Top AI YouTube Videos to Watch Right Now (2026)

AI is moving faster than ever in 2026 — and YouTube is one of the best places to keep up. Whether you want deep technical dives, practical agent-building tutorials, or weekly news roundups, these channels and videos are consistently worth your time. Here's our curated pick of what's trending right now.

1. Lex Fridman — Deep Conversations with AI's Builders

Lex Fridman hosts the most prominent long-form AI interview channel on YouTube — multi-hour conversations with the people actually building and researching AI, including Sam Altman, Demis Hassabis, Yann LeCun, Geoffrey Hinton, and Andrej Karpathy. If you want to understand not just what AI can do but why and where it's going, this is essential viewing.

2. Andrej Karpathy — Neural Networks from First Principles

Former Tesla AI Director and OpenAI co-founder Andrej Karpathy has become one of the most beloved AI educators on YouTube. His "Neural Networks: Zero to Hero" series builds everything from scratch — backpropagation, transformers, GPT — in plain Python with clear intuition. If you want to truly understand how large language models work under the hood, start here.

3. Sam Witteveen — Practical Agent Building with LLMs

Sam Witteveen's channel is laser-focused on building real AI agents and LLM-powered apps. He covers LangChain, LangGraph, multi-agent systems, RAG pipelines, and tool use — with working code and clear walkthroughs. If your goal is to ship something practical rather than just understand theory, his tutorials are among the most directly useful available.