We can currently support 2x2 video walls at 1080p or 3x3 video walls at 720p provided you are using a 4K Apple TV or BrightSign player and have video panels that support 4k passthrough and tiling of 1 signal. If you are familiar with BrightSign Player Synchronization, this is different.
We also support Windows Players with Carousel 7 so it’s possible to create a single-channel video wall that has a larger resolution than 4k with the right hardware. If you have any questions about a specific integration please don’t hesitate to reach out!