Multi-ATV airplay mirroring?

I have some video I have created in years past for
Chasing trains all over the world, and I am hosting a party at my home where I have 4 Apple TV 4K units (all 3rd gen in case that matters). Is there an ability for me to Airplay Mirror that video from one iPad to all four ATVs simultaneously, or will I have have to have one iPad with with ATV mirroring the content from each iPad to its corresponding ATV?