feat: Add Docker support with hola-proxy for YouTube downloads

- Create Dockerfile with hola-proxy for residential IP proxying
- Add PROXY_URL environment variable support to yt-dlp
- Update README to use Docker SDK

This enables YouTube downloads from HuggingFace Spaces by routing
traffic through Hola's residential proxy network.

Dockerfile

@@ -0,0 +1,39 @@
+FROM python:3.11-slim
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    ffmpeg \
+    wget \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install hola-proxy
+RUN wget -O /usr/local/bin/hola-proxy \
+    https://github.com/Snawoot/hola-proxy/releases/download/v1.14.0/hola-proxy.linux-amd64 \
+    && chmod +x /usr/local/bin/hola-proxy
+
+# Create app directory
+WORKDIR /app
+
+# Copy requirements first for caching
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create startup script
+RUN echo '#!/bin/bash\n\
+# Start hola-proxy in background with residential IPs\n\
+hola-proxy -country us -proxy-type lum -bind-address 127.0.0.1:8080 &\n\
+sleep 2\n\
+# Start the Gradio app\n\
+python app.py\n\
+' > /app/start.sh && chmod +x /app/start.sh
+
+# Expose Gradio port
+EXPOSE 7860
+
+# Set environment variable for proxy
+ENV PROXY_URL=http://127.0.0.1:8080
+
+CMD ["/app/start.sh"]

README.md

@@ -3,9 +3,7 @@ title: Video Analyzer
 emoji: "🎬"
 colorFrom: blue
 colorTo: purple
-sdk: gradio
-sdk_version: "5.9.0"
-python_version: "3.11"
+sdk: docker
 app_file: app.py
 pinned: false
 license: mit

app.py

@@ -114,6 +114,11 @@ CHAT_MODELS = [
 ]
 
 
+def get_proxy_url() -> str | None:
+    """Get proxy URL from environment for YouTube downloads."""
+    return os.environ.get("PROXY_URL")
+
+
 def download_video(url: str, output_dir: str) -> list[dict]:
     """Download video from YouTube URL (video or playlist)."""
     ydl_opts = {
@@ -125,6 +130,11 @@ def download_video(url: str, output_dir: str) -> list[dict]:
         "retries": 3,
     }
 
+    # Add proxy if configured
+    proxy_url = get_proxy_url()
+    if proxy_url:
+        ydl_opts["proxy"] = proxy_url
+
     downloaded = []
     try:
         with yt_dlp.YoutubeDL(ydl_opts) as ydl: