Update app.py

app.py

@@ -15,11 +15,11 @@ from concurrent.futures import ThreadPoolExecutor
 import ffmpeg
 
 def process_video(video_file, youtube_url, language_choice):
-    if language_choice == None:
+    if language_choice == None or (video_file == None and youtube_url == None):
         return None
     if video_file != None and youtube_url != None:
         return None
-    elif youtube_url != None:
+    elif video_file == None and youtube_url != None:
         yt = YouTube(youtube_url)
         yt.streams.filter(progressive=True, file_extension='mp4').first().download(filename="original.mp4")
         video_file = "original.mp4"