The author of the Article Lights, Camera...Engagement! Three Great Tools for Classroom Video, Ron Peck is a social studies teacher who I have been fortunate to get to know over the past few years.
Animoto - I looked into Animoto and found that you are able to sign up for an educator account that needs to be approved by Animoto. This can take several weeks. After you are approved you are able to enroll students using anonymized names.
The other two resources can be done with a multitude of tools. In each case these projects could be done with the camera on the iPad or the webcam on a laptop using WeVideo.
An additional idea for video projects is Paper flip Videos.
Paperflip Video is a simple project that uses your iPad or WeVideo and your webcam to create a product where students can demonstrate their understanding.