Windows Live Movie Maker in Windows 8

Windows Live Movie  Maker is not  with Windows 8, you need to download
Windows essential 2012 from
http://windows.microsoft.com/en-ca/windows-live/movie-maker
which includes Windows Live Movie  Maker.

To upload video from  Windows Live Movie  Makerto youtube, you may get an error message. This is due to the security setting in your google account.

Go to Google setting,  click security:
https://www.google.com/settings/security/lesssecureapps?hl=en-GB
Change "Access to less secure apps" from disable to enable.