diff --git a/redditbot.py b/redditbot.py
index dd4554c..c788a11 100644
--- a/redditbot.py
+++ b/redditbot.py
@@ -222,7 +222,7 @@ async def main():
                     except Exception:
                         logging.exception('Exception when getting video data')
                     else:
-                        attributes.append(DocumentAttributeVideo(duration, w, h, supports_streaming=mimetype == 'video/mp4'))
+                        attributes.append(DocumentAttributeVideo(duration, w, h, supports_streaming=mimetype == 'video/mp4' or None))
                 await client.send_message(chat, j, file=k, link_preview=False, attributes=attributes)
 
     async def _get_video_data(filename):