A:AnswerThere is no specific audio system in this laptop. It would be considered high definition sound. If you want something comparable to the Beats Audio experience, I would recommend looking at the Envy or Spectre laptops that have been tuned by Bang & Olufsen. They are a very high end sound.
A:AnswerThe Windows 10 version of media player has given up on playing video (there may be a paid upgrade). I use the VLC media player from https://www.videolan.org/.