Amazon Spokesperson:
The Amazon spokesperson also confirmed this statement and said it came-up as a big surprise for us.
Google made a change today around 3 pm. YouTube used to be available to our shared customers on Echo Show. As of this afternoon, Google has chosen to no longer make YouTube available on Echo Show, without explanation and without notification to customers. There is no technical reason for that decision, which is disappointing and hurts both of our customers.
Google, About the Removal of YouTube from Amazon Echo Show
The news of the removal of YouTube from Amazon Echo Show was first reported by The Verge. Talking to it Google has contradicted the statement of Amazon.
We’ve been in negotiations with Amazon for a long time, working towards an agreement that provides great experiences for customers on both platforms. Amazon’s implementation of YouTube on the Echo Show violates our terms of service, creating a broken user experience. We hope to be able to reach an agreement and resolve these issues soon.