diff --git a/app.py b/app.py
index 57a1cc4..829d1f5 100644
--- a/app.py
+++ b/app.py
@@ -4,6 +4,7 @@ import uuid
 from flask import Flask, render_template, request, send_file, jsonify
 from werkzeug.utils import secure_filename
 import json
+import time
 
 app = Flask(__name__)
 app.config['UPLOAD_FOLDER'] = 'uploads'
@@ -14,6 +15,9 @@ app.config['MAX_CONTENT_LENGTH'] = 500 * 1024 * 1024  # 500MB max file size
 os.makedirs(app.config['UPLOAD_FOLDER'], exist_ok=True)
 os.makedirs(app.config['OUTPUT_FOLDER'], exist_ok=True)
 
+# Store original filenames
+original_filenames = {}
+
 ALLOWED_EXTENSIONS = {'mp4', 'avi', 'mov', 'mkv', 'wmv', 'flv', 'webm'}
 
 def allowed_file(filename):
@@ -71,6 +75,9 @@ def upload_video():
         # Get video information
         video_info = get_video_info(filepath)
         
+        # Store original filename for later use
+        original_filenames[file_id] = file.filename
+        
         return jsonify({
             'file_id': file_id,
             'filename': filename,
@@ -189,7 +196,13 @@ def download_video(file_id):
         if not os.path.exists(output_path):
             return jsonify({'error': 'File not found'}), 404
         
-        return send_file(output_path, as_attachment=True, download_name='processed_video.mp4')
+        # Get original filename and create download name
+        original_name = original_filenames.get(file_id, 'video.mp4')
+        name_without_ext = os.path.splitext(original_name)[0]
+        timestamp = int(time.time() * 1000) % 100000  # Last 5 digits of timestamp
+        download_name = f"{name_without_ext}_processed_{timestamp}.mp4"
+        
+        return send_file(output_path, as_attachment=True, download_name=download_name)
     except Exception as e:
         return jsonify({'error': str(e)}), 500
 
@@ -207,6 +220,10 @@ def cleanup_files(file_id):
             if f.startswith(file_id):
                 os.remove(os.path.join(app.config['OUTPUT_FOLDER'], f))
         
+        # Clean up stored original filename
+        if file_id in original_filenames:
+            del original_filenames[file_id]
+        
         return jsonify({'success': True})
     except Exception as e:
         return jsonify({'error': str(e)}), 500