Google is making some changes in its YouTube API today, and that could mean your favorite third party YouTube app on Windows Phone and Windows 8.1 may no longer be working, at least until the developer switches to the new API.

We have received reports from users of the MyTube app and the MetroTube app for Windows Phone, along with the Hyper For Youtube app Windows 8.1 today. They report that when they try to launch a video in those apps they see the video below, with the message (in several languages):

"YouTube is upgrading to a newer version, which is not supported by this device or app. To learn more and see where you can watch YouTube, visit

The message is showing up because Google has retired its old YouTube v2 API in favor of the new v3 API. Any apps that still support the older version cannot work.

As we reported last week, the popular TubeCast app for Windows Phone and Windows 8.1 has been updated with full support for the new YouTube v3 API. All the other third party apps on Windows Phone and Windows 8.1 will have to upgrade to the new API in order to work again.

Source: YouTube; Thanks to Sandar and Ryuuichi for the tips!