Have my multimedia in browsers, kde recognizes it and media controls work within taskbar preview, notification area and - most important - with the media keys.
Plus: Browsers are more secure and no need for other applications.
Yeah. For a moment I found this interesting but then I remembered that KDE Plasma has perfect integration with all of the streaming services I use through my browser. It seems to just work without any additional software. You can even control media from an Android phone if you have the KDE Connect app installed.