This media player has its own limitations it is likely for users to encounter files that cannot be played correctly by this program. The native video player for Mavericks, which is QuickTime 10.3, can only play a handful of files.
However, it can still be a big challenge, even for new platforms like the Mavericks, to play all types of audio and video files for the sake of its users. Enjoying the videos of your loved ones, of your favorite stars, or of complete strangers is a very popular hobby these days.