I've seen the same Feed Status page errors as well, several different channels. All of the URLs with errors are Vimeo file URLs. Sometimes the videos with the error messages still display on-screen, sometimes they do not.
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Make sure you use the static links provided by Vimeo (Pro Only), otherwise your video links might change. In the video go to Settings/Video File/Access Your Video Files. Using the HLS link requires changing the videoType value to "HLS" and removing the bitrate.