Before I upgraded to Windows 10, I used the Windows 8 OS and I uploaded videos to Youtube with Windows Movie Maker. Now that I have Windows 10, it doesn't let me upload videos to Youtube using the Youtube Plugin on Windows Movie Maker. If I type the username and password of my Youtube account and then click Sign in, it says "Invalid username or password, please try again." I know what my username and password are and caps lock is off but it still says "Invalid username or password, please try again."