Extracting YouTube video data with OpenAI and LangChain

The tutorial details the process of building a command-line application using retrieval-augmented generation (RAG) with OpenAI API and LangChain framework to extract information from YouTube videos without watching them. By leveraging RAG, the application enhances the reasoning capabilities of language models by incorporating external data, specifically YouTube video transcripts retrieved using the youtube-transcript package. These transcripts are processed to generate text embeddings using LangChain and Transformers.js, which are stored in a vector store for efficient retrieval. The application is designed to be interactive, allowing users to input YouTube URLs and query the content using a language model to receive relevant information. It emphasizes the practical application of RAG for creating cost-effective tools that enhance data accessibility and user interaction with AI models.