This plugin implements NowPlaying measure functionality for all media players that show up in Windows 10 volume change notification (including web based ones, Spotify).
Any skin that works with the NowPlaying measure can be modified to work with this plugin.

• newest stable Rainmeter release
• Windows 10 (version 1809 or newer)
• Microsoft C and C++ (MSVC) runtime libraries 14.20 or higher for the platform (x86 or x64) that Rainmeter is installed
  (or you can download the static version that bundles the C++ runtime into the executable)

The media_player.rmskin file from Releases section installs the plugin along with a sample skin for showing media player status (shown in the screenshot above).
Alternativelly, you can download the .dll for your platform.

The skin displays information for the active media player. If there are multiple media players active, you can change the current one using the arrow in Windows change volume popup

The plugin has the same options as the NowPlaying measure (Rainmeter documentation)

[mTitle]
Measure=Plugin
PluginName=MediaPlayer.dll
PlayerType=Title

Note that for the Spotify client on some versions, the cover art includes a spotify banner below the actual art.

This plugin automatically detects if there are transparent borders on the spotify cover art and crops the image to show only the actual cover art.

In case detection doesn't work properly, you can disable cropping completely by adding configuration DisableCoverCropping=True in the cover measure

• find the .ini file where the NowPlaying measures are defined
• replace

  Measure=NowPlaying
  

  or

  Measure=Plugin
  Plugin=NowPlaying
  

  with

  Measure=Plugin
  Plugin=MediaPlayer.dll
  

• save the file and reload the skin

• not all players support all the features (for example Youtube playback doesn't provide playback position)