The pre-installed KODI provides many add-ons -including the well known Exodus- which can be used to watch online material (Movies, Series, etc).
The pre-installed KODI is based on the 16.1 RC3 build, dated June 6 2016.
Having too many add-ons installed could lead to incompatibilities. We experienced an annoying "Search Error" message, something you can fix my disabling Twitter Addon under the Running Services menu.
Under "Video settings" there isa RKMC tab, with all options enbaled:
Under the "Sound settings" there are options to enable Dolby Digital (AC3) DTS, TrueHD or DTS-HD:
If you want to use any other KODI build, its suggested to get the FTMC (fork for Kodi and provides hardware acceleration and more features on the Rockchip rk3228 chips). Normal KODI wouldn't possibly have hardware acceleration enabled: