Update app.py

app.py

@@ -104,12 +104,32 @@ def download_audio(url, cookies_file_path=None):
             'outtmpl': output_path + '.%(ext)s',
             'quiet': True,
             'no_warnings': True,
+            # Anti-bot detection measures
+            'user_agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
+            'referer': 'https://www.youtube.com/',
+            'extractor_retries': 3,
+            'fragment_retries': 3,
+            'retry_sleep_functions': {'http': lambda n: 2 ** n},
         }
         
         # Add cookies file if provided
         if cookies_file_path and os.path.exists(cookies_file_path):
             ydl_opts['cookiefile'] = cookies_file_path
             print(f"Using cookies file: {cookies_file_path}")
+        else:
+            print("No cookies file provided - may encounter bot detection")
+            # Additional headers without cookies
+            ydl_opts.update({
+                'headers': {
+                    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
+                    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
+                    'Accept-Language': 'en-us,en;q=0.5',
+                    'Accept-Encoding': 'gzip,deflate',
+                    'DNT': '1',
+                    'Connection': 'keep-alive',
+                    'Upgrade-Insecure-Requests': '1',
+                }
+            })
         
         with YoutubeDL(ydl_opts) as ydl:
             info_dict = ydl.extract_info(url, download=True)
@@ -124,7 +144,10 @@ def download_audio(url, cookies_file_path=None):
             raise FileNotFoundError(f"Downloaded audio file not found")
                 
     except Exception as e:
-        raise Exception(f"Failed to download audio: {str(e)}")
+        if "403" in str(e) or "Forbidden" in str(e):
+            raise Exception(f"YouTube blocked the request (403 Forbidden). Please upload your cookies.txt file to bypass bot detection. Original error: {str(e)}")
+        else:
+            raise Exception(f"Failed to download audio: {str(e)}")
 
 def transcribe_audio(file_path):
     """Transcribe audio file using Whisper"""
@@ -352,11 +375,17 @@ with gr.Blocks(
             )
             
             gr.Markdown("""
-            **How to get cookies.txt:**
-            1. Install browser extension like "Get cookies.txt LOCALLY"
-            2. Visit YouTube in your browser (logged in)
-            3. Export cookies for youtube.com
+            **How to get cookies.txt to fix 403 Forbidden errors:**
+            1. Install browser extension: "Get cookies.txt LOCALLY" 
+            2. Visit YouTube in your browser (while logged in)
+            3. Click the extension icon and export cookies for youtube.com
             4. Upload the downloaded cookies.txt file here
+            
+            **Alternative extensions:**
+            - "cookies.txt" (Chrome/Firefox)
+            - "Export Cookies" (Chrome)
+            
+            ⚠️ **Important**: Without cookies, you'll likely get 403 Forbidden errors
             """)
             
             url_input = gr.Textbox(
@@ -380,10 +409,11 @@ with gr.Blocks(
             
             gr.Markdown("""
             ### 💡 Tips:
-            - Upload cookies.txt to avoid bot detection
+            - **MUST upload cookies.txt** to avoid 403 Forbidden errors
             - Works best with financial YouTube channels
             - Ensure video has clear audio
             - English content works best
+            - Try shorter videos first (under 10 minutes)
             """)
     
     with gr.Row():