Windows Movie Maker: Can’t upload to youtube

When i try and upload a video from windows movie maker, it doesn't work. When it asks me to sign in, i put my password and username in (which is my gmail account) it tells me there is either an invalid password or username. When i put the exact same username and password in when logging in on the youtube website, it works. To sum it up, i can't sign in to youtube on Windows Movie Maker so i can not upload the video to youtube. On top of that, i can not convert the file to any other version when i save it (which would allow me to upload it to youtube from a different program), Is there any explanation to the issue i am currently facing?