Yes, but in order to run the same playlist on different devices at the same time, you will need an HDMI splitter. It works by connecting one player (for example, the viewneo 4K Signagebox) and then distributing the signal to different devices through the HDMI splitter. Since only one player is used, the same content will run on both devices.
However, it is not possible to synchronize different devices. Therefore, if you have multiple players associated with the same account, you will not be able to synchronize your content across multiple displays.