YouTube TV's motion playback capability

When watching sports events, the ability to playback fast moving actions in slow-motion greatly improves the viewer experience. However, currently there are no commercially available online-streaming devices that support slow-motion playback.   

It appears that, based on the popularity of several professional sports, there is a clear opportunity for a streaming device manufacturer to gain a strategic advantage by providing a fully functional slow-motion capability.  If implementation of slow-motion requires the cooperation of a streaming service, perhaps a joint venture that involves YouTubeTV might result a very successful competitive advantage for viewing sports events.  

How about it ROKU? 
You and YouTubeTV combine to make sports fans happy with a really good slow-motion capability.