set chunksize to 4M

youtube_upload/upload_video.py

@@ -28,7 +28,7 @@ def _upload_to_request(request, progress_callback):
             else:
                 raise KeyError("Expected field 'id' not found in response")
 
-def upload(resource, path, body, chunksize=1024*1024, 
+def upload(resource, path, body, chunksize=4*1024*1024, 
         progress_callback=None, max_retries=10):
     """Upload video to Youtube. Return video ID."""
     body_keys = ",".join(body.keys())