If your Video is not showing on your Roku channel or giving you and error message on the Fire TV channel, then your Video url might be incorrect.
To make sure that the video url is correct, it has to play in the player on the OTTfeed video detail page. Incorrect Vimeo video url starts with https://vimeo.com/…  and correct Vimeo video url starts with https://player.vimeo.com/external/…

Note: you need to have a Vimeo Pro/Standard or higher account in order to have direct access to the video file URL.