Several thoughts.
Short phrases.
Meaning unclear.
Are you saying you are using video displays on each floor to show a series of images on a USB stick or drive to display directory information?
And the one you are playing through a Roku only plays for 60 seconds instead of giving you a continuous display?
If that's what you are asking:
What model Roku (Settings > System > About)? How is it connected to get these images? What are you using to display the images, the Roku Media Player app? Was it working previously but stopped recently?
Roku Community Streaming Expert
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Note: I am not a Roku employee.
