Windows 7 Media Player
The maximum supported resolution is 1920 × 1080 pixels for both software and DXVA decoding. Please refer to http://msdn.microsoft.com/en-us/library/windows/desktop/dd797815(v=vs.85).aspx
The recorded Zoom video of a shared screen cannot be played with WMP on Windows 7 if the resolution of the shared screen is higher than 1920x1080.
The recording resolution is based on the largest shared screen in the meeting or webinar, so even if video and screens were shared at lower resolutions, Windows Media Player may not be able to play the recording.