If your device is failing to load the TelemetryTV Media Player, it likely needs an update.
Chrome devices default to auto-update, but it can take a while on new devices because they need to download + apply the update and they could be on a very outdated version. (See more on updates here)
Commonly, the device will get stuck on the following screen as it is trying and failing to launch the app:
To force an update on your device, follow these steps:
From the white Initializing Application screen, press Ctrl+Alt+S to exit kiosk mode (if your device gets past this screen, you'll need to restart it and press this combination as soon as you see that screen)
Open a Chrome browser and go to chrome://settings/help
Your device should automatically pick up the update and start downloading it
Once complete, restart the device and allow it to boot into kiosk mode. It should work!