If you have checked the common issues that keep VMcast from playing properly, here are additional troubleshooting steps you may find helpful.
If your device has been playing continuously for a long time or an update has gotten stuck, you may need to manually restart the stick.
A downloaded file may be corrupted on your device. For example, you may see a "Video Load Error" or "Content Load Error" when you play your loop.
It may be necessary to remove all of your VMcast app data and downloaded content from the device.
It may be necessary to start with a clean slate and reinstall the VMcast app on your device.
Updates are often needed to ensure that the device and its apps run properly. These are usually done automatically, but you may need to manually update your device.