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app.py

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+import streamlit as st
+import pytube
+
+def get_video_details(url):
+    """Fetches video details using pytube, handling potential errors."""
+    try:
+        yt = pytube.YouTube(url)
+        title = yt.title
+        streams = yt.streams.filter(progressive=True)  # Focus on progressive downloads
+        return title, streams
+    except pytube.exceptions.RegexMatchError:
+        st.error("Invalid YouTube URL. Please try again.")
+        return None, None
+    except pytube.exceptions.PytubeError as e:
+        st.error(f"An error occurred: {e}")
+        return None, None
+
+def download_video(streams, selected_quality):
+    """Downloads the video based on user selection, handling potential errors."""
+    try:
+        stream = streams.get_by_resolution(selected_quality)
+        stream.download()
+        st.success(f"Video downloaded successfully!")
+    except pytube.exceptions.PytubeError as e:
+        st.error(f"Download failed: {e}")
+
+def main():
+    """Builds the Streamlit app with user interface and download functionality."""
+    st.title("YouTube Video Downloader")
+
+    url = st.text_input("Enter YouTube Video URL:")
+    if url:
+        title, streams = get_video_details(url)
+        if title and streams:
+            st.subheader(f"Video Title: {title}")
+
+            quality_options = [stream.resolution for stream in streams if stream.progressive]
+            selected_quality = st.selectbox("Select Video Quality:", quality_options)
+
+            if st.button("Download Video"):
+                download_video(streams, selected_quality)
+
+if __name__ == "__main__":
+    main()

requirements.txt

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+pytube
+streamlit