Animoto
Example Book Trailer Made with Animoto
Magisto
Example Book Trailer Made with Magisto
Insert Videos from YouTube
In order to insert videos from YouTube into Movie Maker, you need to download the video into an MP4 file. You can use one of the following programs to download videos from YouTube.
Save from Net - Don't install anything! It works without the installation.
If this site doesn't work here are two other options:
Clip Converter - Again, don't install anything.