I'm not sure if anyone posted it, but Google had announced that they were going to block Youtube from Amazon Fire TV devices, because Amazon wouldn't allow Google Chromecast and other gear to be sold on their site.

Well clearly that's rattled Amazon's cage....

In a move that could de-escalate some of the growing tension between the two companies, Amazon has decided to once again start selling Google's Chromecast video streaming device two years after removing it from the online retailing site.
The move comes just days after Google said it would block users of Amazon's Fire TV starting from accessing YouTube starting Jan. 1, after already taking the same measure for users of Amazon Echo Show in September.
Google had described the planned move as a response to Amazon's continued refusal to carry products such as Chromecast, Google Home and its Nest line of smart home products. Amazon also has not made its Prime Video service available to users of Google Cast, the company had noted.

Amazon Resumption of Chromecast Units Helps Defuse Spat With Google