I just received this message:
Hello,
Vimeo believes to have found the issue to the Direct Publisher feed error issues. In fact, we're already seeing many feeds successfully ingesting for previously-published channels. Feel free to check on-device and in the Developer Dashboard (under Feed Status) to see if your content is appearing successfully.
We will update you once Vimeo has officially confirmed the fix on their end. We hope to do so in the next day or two.
Thank you for your continued patience as we work with Vimeo to resolve these feed errors.