Install smplayer-themes by entering the following commands in the terminal:
sudo apt update sudo apt install smplayer-themes
Description:
complete front-end for MPlayer - icon themes
Qt Mplayer front-end, with basic features like playing videos, DVDs, and VCDs to more advanced features like support for MPlayer filters and more. One of the most interesting features of SMPlayer: it remembers the settings of all files you play. So you start to watch a movie but you have to leave... don't worry, when you open that movie again it will resume at the same point you left it, and with the same settings: audio track, subtitles, volume... . This package contains additional icon themes.
Homepage: http://smplayer.sourceforge.net/
Version: 1:17.3.0-1
Section: universe/graphics