Don't get me wrong, I'm not a huge Apple fan, but the lastest gen Apple TV does have some very very posh video screensavers that they call "Aerial" which can be seen here: http://benjaminmayo.co.uk/watch-all-the-apple-tv-aerial-video-screensavers
And some guy has ported them into an Android "Daydream" app, which upon loading on my Nexus Player, works beautifully well...
https://play.google.com/store/apps/details?id=com.codingbuffalo.aerialdream&hl=en
(x-post from /android)
Developer here. Thank you all for the comments. Aerial Dream was the result of a weekend of hacking for my personal use and still has quite a few rough edges.
The source code is available at https://github.com/cachapa/AerialDream so contributions are always welcome :-)