Create app.py

app.py

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+import streamlit as st
+import os
+import langchain
+import langchain_huggingface
+import huggingface_hub
+from langchain_community.document_loaders import YoutubeLoader
+from langchain_huggingface import HuggingFaceEndpoint,ChatHuggingFace
+os.environ['HUGGINGFACEHUB_API_TOKEN'] = os.getenv("Utube")
+os.environ['HF_TOKEN'] = os.getenv("Utube")
+meta_llm=HuggingFaceEndpoint(repo_id="meta-llama/Llama-3.1-8B-Instruct",
+                             provider="nebius",
+                             temperature=0.5,max_new_tokens=150,
+                             task="conversational")
+model=ChatHuggingFace(llm=meta_llm,
+                      repo_id="meta-llama/Llama-3.1-8B-Instruct",
+                      provider="nebius",
+                      temperature=0.5,
+                      max_new_tokens=50,
+                      task="conversational")
+def get_youtube_transcript(url):
+    loader = YoutubeLoader.from_youtube_url(url)
+    docs = loader.load()
+    return docs[0].page_content
+
+# 📝 Function to summarize
+def summarize_youtube_video(url):
+    transcript = get_youtube_transcript(url)
+    if len(transcript) > 3000:
+        transcript = transcript[:3000]  # Trim to avoid token limit
+    prompt = f"Summarize this YouTube video transcript:\n\n{transcript}"
+    response = model.invoke(prompt)
+    return response.content
+st.set_page_config(page_title="YouTube Video Summarizer", layout="centered")
+st.title("🎬 YouTube Video Summarizer")
+st.write("Paste a YouTube video URL below to get a concise summary using Llama 3.1 🧠")
+
+youtube_url = st.text_input("📥 Enter YouTube URL:")
+if st.button("Summarize"):
+    if youtube_url.strip() == "":
+        st.warning("Please enter a valid YouTube video URL.")
+    else:
+        with st.spinner("Fetching and summarizing..."):
+            try:
+                summary = summarize_youtube_video(youtube_url)
+                st.success("✅ Summary Generated:")
+                st.write(summary)
+            except Exception as e:
+                st.error(f"Something went wrong: {e}")