You might add or remove videos to your showcases/channels on Vimeo.
Your Tappla MRSS feed will automatically be updated every 24 to 48 hours.
What does that mean for your Fire TV app?
Fire TV dynamically updates your videos, titles, descriptions, and navigation bar sections/categories each time the app starts.
So as long as your MRSS feed is updated, you should see also the updates in your Fire TV app - no need to manually refresh your Fire TV app by yourself.
Tappla syncs your MRSS feed every 24 to 48 hours.