What's a retry in this case? Retry to upload a failed upload, or retry to get a response during an upload (or both)?

Were you able to test the retry code? (I know there's no unit tests, but any manual testing?)

I noticed that if you try to upload a video that already exists, the upload succeeds, but [the video is ultimately rejected because of duplicate content](https://support.google.com/youtube/answer/58139?hl=en). Is there a way to detect this with the API and inform or warn the user?