AskTube: An Intelligent YouTube Video Q&A Assistant Based on RAG

AskTube Project Basic Information

• Original Author/Maintainer: Tipto Ghosh
• Source Platform: GitHub
• Project Link: https://github.com/Tipto-Ghosh/AskTube
• Release Date: June 12, 2026

Core Points

AskTube is an open-source intelligent YouTube video Q&A assistant designed to solve the pain point of users quickly obtaining information from videos. Its core architecture is based on Retrieval-Augmented Generation (RAG) technology, combining large language models (LLM) and semantic search capabilities to implement video transcript extraction, semantic index construction, and intelligent Q&A functions, ensuring that answers are strictly based on the actual content of the video and avoiding model hallucinations.

Traditional video watching requires a lot of time, and users find it difficult to quickly locate the information they need. AskTube uses natural language processing technology to allow users to interact with video content in a conversational manner, aiming to provide an efficient video information retrieval and Q&A experience.

AskTube's technical implementation includes three key modules:

1. Video Transcript Extraction: Extract video audio and perform speech recognition to convert it into searchable text, laying the foundation for subsequent operations;
2. Semantic Search Index Construction: Split the transcript text into text chunks, convert them into vectors via an embedding model, and store them in a vector database to build a semantic index, supporting fast semantic retrieval;
3. Intelligent Q&A Engine: After vectorizing the user's question, recall relevant text fragments from the vector database and input them as context into the LLM to generate accurate answers, ensuring the accuracy and traceability of the answers.

AskTube has practical value in multiple scenarios:

• Learning Assistance: Students quickly query knowledge points from teaching videos without repeated viewing;
• Content Research: Researchers efficiently extract key information from interview/lecture videos;
• Content Moderation: Platform operators quickly understand the core theme of videos;
• Accessibility: Provide a way for hearing-impaired users to access video content in text form.

AskTube adopts a mainstream LLM application technology stack: vector database + embedding model + large language model. This architecture is widely used in knowledge base Q&A, document analysis, and other fields. The project is released in open-source mode, allowing developers to secondary develop based on its architecture to adapt to different application scenarios.

AskTube demonstrates the application of RAG technology in consumer products, combining the massive video information on YouTube with LLM intelligent Q&A to provide a new way of video content consumption. For developers who want to build similar applications, AskTube provides a clear reference implementation.