In this video, Sam Witteveen introduces Pydantic AI, a new agent framework built on the Pydantic validation library, designed for creating various LLM applications and AI agents. The tutorial covers the framework’s features, including support for multiple models, structured outputs, and easy integration with tools. Witteveen demonstrates how to set up agents, manage prompts, and use Pydantic for validation in a Pythonic way, making it a promising option for developers looking to build LLM applications.