Multimedia Players for KDE
A standard Debian KDE installation will include two software packages for watching videos and listening to music, dragonplayer and juk respectively. However, you may have noticed other KDE distributions ship with additional multimedia players that are available in Debian but are not part of the official KDE release and are not included in these selections.
The following are all the KDE multimedia players available for Debian that you might be interested in:
juk - A traditional music player and music management software that lets you import your collection, import playlists, automatically guess tag information for your files, bulk-rename files based on tags, and manually create and edit tags.
dragonplayer - A very simple video player that remembers your place, automatically loads subtitles, and lets you tweak the video display settings on the fly.
haruna - A configurable and sleek video player based on MPV that supports playing web content through youtube-dl.
elisa - A modern, beautiful, and simple music player that automatically finds your music and does not require any configuration for you to start listening.
kaffeine - An advanced media player that has excellent support for digital TV, DVDs, audio CDs, VCDs, and custom playlists.
See also
https://apps.kde.org/categories/multimedia/ - KDE's full list of multimedia applications