use default chunksize=1024**2

youtube_upload/main.py

@@ -105,7 +105,7 @@ def upload_video(youtube, options, video_path, total_videos, index):
 
     debug("Start upload: {0} ({1})".format(video_path, complete_title))
     video_id = youtube_upload.upload_video.upload(youtube, video_path, request_body,
-        progress_callback=progress.callback, chunksize=16*1024)
+        progress_callback=progress.callback)
     progress.finish()
     return video_id
 

youtube_upload/upload_video.py

@@ -28,7 +28,7 @@ def _upload_to_request(request, progress_callback):
         elif status and progress_callback:
             progress_callback(status.total_size, status.resumable_progress)
         
-def upload(resource, path, body, chunksize=int(1e6), progress_callback=None):
+def upload(resource, path, body, chunksize=1024*1024, progress_callback=None):
     """Upload video to Youtube. Return video ID."""
     body_keys = ",".join(body.keys())
     media = apiclient.http.MediaFileUpload(path, chunksize=chunksize,