While Dragon Player is great, it could be "more great" simply by adding a couple of simple commandline switches. Commandline switches to be able to run DragonPlayer in fullscreen modeo, to turn on the fullscreen volume meter, and to fully exit/terminate when a video is finished would allow DragonPlayer to be easily integrated into KDE as a fullscreen video player.
KDE is a community of people, I doubt dragon would easily integrate into humans. The way to control dragon is over dbus. # fullscreen qdbus org.mpris.MediaPlayer2.dragonplayer /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Fullscreen true # slider qdbus org.mpris.MediaPlayer2.dragonplayer /dragonplayer/MainWindow_1/actions/volume org.qtproject.Qt.QAction.trigger # quit # listen to property change on org.mpris.MediaPlayer2.Player.PlaybackStatus then qdbus org.mpris.MediaPlayer2.dragonplayer /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Quit