Install the building tools (Python included) with npm --add-python-to-path='true' --debug install --global windows-build-tools.
Then run npm install.
Install ffpmeg: download it and add its bin folder to the PATH.
Install https://github.com/rdp/screen-capture-recorder-to-video-windows-free.
Share screen ffmpeg -f dshow -i video="screen-capture-recorder" output.flv
Share single process ffmpeg -f gdigrab -framerate 30 -i title="german.avi - VLC media player" -b:v 3M germ.flv where "title" means actual title of a target window.
If it says that can't find CL.exe:
npm config set msvs_version 2013 --global