FEAT: Add minimal video upload and playback

src/streamlit_app.py

@@ -1,12 +1,22 @@
 import streamlit as st
-from moviepy.editor import VideoFileClip
+import tempfile
+import os
 
-st.set_page_config(page_title="MoviePy Test")
-st.title("Testing `moviepy` Installation")
+st.set_page_config(page_title="Video Upload Test")
+st.title("Video Upload and Playback Test")
 
-try:
-    # This line will only succeed if moviepy is installed correctly
-    st.success("Successfully imported `VideoFileClip` from `moviepy.editor`!")
-    st.write("This confirms that the `moviepy` library was installed correctly.")
-except ImportError as e:
-    st.error(f"Failed to import `moviepy`. Error: {e}")
+# Create a file uploader widget
+uploaded_file = st.file_uploader("Choose a video file...", type=["mp4", "mov", "avi", "mkv"])
+
+if uploaded_file is not None:
+    # The uploader gives us an in-memory file buffer.
+    # We need to save it to a temporary file on the server's disk for st.video to use it.
+    with tempfile.NamedTemporaryFile(delete=False, suffix='.mp4') as tfile:
+        tfile.write(uploaded_file.read())
+        temp_video_path = tfile.name
+
+    # Display the video player
+    st.video(temp_video_path)
+
+    # Clean up the temporary file after use
+    os.unlink(temp_video_path)