For me, Windows Movie Maker is the best software to create and edit videos for sharing them on the social networks. And is the best because is very simple and easy to use and of course, it's free. But recently you may discovered that Windows Movie Maker is nowhere to be found, the official MS links are down and the program suite known as "Windows Essentials" web edition doesn't work anymore. Here is how to install Windows Movie Maker 2012 on Windows 10.
You can get Windows Movie Maker by downloading the complete Windows Live Essentials package. Get if from here.
Now run it and on the first page, select the second option.
Now select only the "Photo gallery and Movie Maker" and click install.
You are ready.