This might be helpful for people who are having filetype issues uploading to cloud services. We found it easier to just serve from Github Pages.
1) Get a Github account. 2) Create a private Repository. You can serve a public repository, but your video links will be searchable. 3) Create a gh-pages branch in the repo. 4) Create a file named robots.txt in that branch and copy the following into it:
User-agent: * Disallow: /
This prevents search engines from finding it.
5) Server your json file from this repository. The feed location will be https://username.github.io/repositoryname/feed.json.
Along with Vimeo Pro you can get a Roku channel up for less than $200/yr.