We've just released a new player with vastly upgraded hardware accelleration. Your milage may vary depending on graphic chipset, manufacturer and drivers, but most users should still see improvements. We've even seen XP computers from 2009 now using half as much CPU when playing videos!
Some devices like the Intel Compute stick give even better results, now you can play Full HD videos in 1920x1080 with 5-6% cpu usage!!
To make use of it, make sure your players are upgraded to 3.x or newer software.
Don't want to use it? You can disable it in the player menu if you don't want to use it for whatever reason.