Update app.py

app.py

@@ -1,6 +1,12 @@
 import gradio as gr
 import yt_dlp as youtube_dl
 import os
+import re
+
+def sanitize_filename(filename):
+    """Remove or replace characters that are unsafe for filenames."""
+    unsafe_chars = r'[<>:"/\\|?*\u0000-\u001F]'
+    return re.sub(unsafe_chars, '_', filename)
 
 def download_youtube_video(youtube_url):
     """Downloads a YouTube video using yt_dlp and returns the downloaded file path."""
@@ -16,10 +22,10 @@ def download_youtube_video(youtube_url):
 
         with youtube_dl.YoutubeDL(ydl_opts) as ydl:
             result = ydl.extract_info(youtube_url, download=True)
-            video_title = result.get('title', None)
+            video_title = sanitize_filename(result.get('title', 'video'))
             video_ext = 'mp4'  # We're forcing mp4 format
             downloaded_file = f"{video_title}.{video_ext}"
-            return os.path.abspath(downloaded_file)
+            return downloaded_file
 
     except Exception as e:
         print("An error occurred:", e)