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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**.
+
+---
+
+## 🚀 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  
+
 ---
-title: Youtube Chatbot
-emoji: 🚀
-colorFrom: indigo
-colorTo: red
-sdk: gradio
-sdk_version: 5.49.0
-app_file: app.py
-pinned: false
-license: mit
-short_description: Multilingual YouTube chatbot powered by LangChain.
+
+## 🧩 Architecture
+
+
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+## 🧠 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) |
+
+---