New to Plex; Need to show on 4 TVs at once.

I’m new to Plex, and have a need to show a video file (business) on four HDMI televisions at once. Is there a Plex cloud or device solution I can buy into? Currently using 4 separate Roku 2 devices (hacked to repeat video) running video file off USB stick.

What I’d really like is a single source (cloud based would be awesome) to play a central file on repeat until we stay stop… on 4 televisions as far as 80’ apart from each other. Ideas?