README.md

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🧠 YouTube Transcript Chatbot (RAG) — LLaMA, Gemma, DeepSeek, OpenAI

An advanced Retrieval-Augmented Generation (RAG) chatbot that answers questions from YouTube video transcripts using top open-source LLMs — Llama 3.2, Gemma 2, DeepSeek, and OpenAI GPT-OSS.

Built with Streamlit, LangChain, Hugging Face Hub, and FAISS.

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🚀 Features

✅ Fetch YouTube transcripts via RapidAPI
✅ Embed and store transcript chunks using FAISS
✅ Query understanding through LangChain retrieval pipeline
✅ Supports multiple Hugging Face chat-based models:

• 🦙 Llama-3.2-1B-Instruct
• 💎 Gemma-2-2B-it
• 🧠 DeepSeek-V3.2-Exp
• 🔮 OpenAI GPT-OSS-20B

✅ Adjustable temperature for creative or factual outputs
✅ Seamless Streamlit UI
✅ Caching for faster repeat queries

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🧩 Architecture

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🧠 Tech Stack

Component	Technology
Frontend	Streamlit
Backend	LangChain
LLMs	Hugging Face Endpoints
Embeddings	intfloat/multilingual-e5-base
Vector Store	FAISS
API	YouTube Transcript API (RapidAPI)

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