Let me clarify my problem, including the latest developments:
Situation
I have a Windows 10 laptop with Windows Media Streaming Service running.
I have a Samsung Phone with VLC Player 3.5.4. Streaming from the laptop to my phone and playing video files (mkv) using VLC Player and UPnP is working perfectly.
.
Browsing the local network with VLC first comes up with an SMB icon (which doesn't work for me), but after a few minutes it also shows the UPnP icon (which does work for me). If I click the SMB icon by accident, I get a "no media files" message and am lost, because nothing will work anymore. But I can live with that.
I have a Philips "smart" TV with Android 8 and VLC Player version 3.5.4. (i.e. same version as on my phone). I can't get this to work. It only comes up with the SMB icon (which does not work), but never shows the UPnP icon (which is what I need).
My "smart" tv also has a standard (Android?) media player. This player works well. But I am not happy with this player, because it does not support chapters in mkv-files. So I prefer to use the VLC Player.
Question
What should I do, so the UPnP icon will come up in VLC Player on my "smart" tv?