The "Failed to initialize video device" error message is usually related to the DirectX driver or display driver, and only happens on the Windows client app. Please try the following suggestions when this message displays.
1. Verify that DirectX has been installed properly and that Direct3D is enabled, or you could just re-install it to make sure. This is especially good advice when the Direct3D is not available or disabled.
On your computer, click Windows Start Menu --> Search -> enter dxdiag.exe to open the DirectX Diagnostic Tool. Click the Display tab shown below, and check to see if Direct3D is enabled.
2. Update your display driver and restart the computer. This is also a possible solution especially for those display cards with acceleration features.