I use plex to serve alot of home sports videos .
it would be nice to slow down the important moments a 2 or 3 second loop
or just a 25% 50% 75% slow down
and then be able to speed past the boring stuff
If you use a remote that has a skip back & skip forward button you can do a slow motion on Android TV & FireStick. that may be your best option until the feature gets added