This is a free app that is similar to iMovie. For an additional $.99, you can have full capabilities of adding photos, music, voice over, and transitions.
YouTube's response to Vine & Instagram, MixBit allows you to shoot, edit, and post video from your mobile device. Technically an iPhone/iPod app, it would work on iPad.
Canvas video tutorial - a web based lesson curation platform that can display well on an iPad.
I need to check on what happens to documents (PPT, Keynote, PDF) when they are included on a canvas & viewed on an iPad.
Great set of video introductions to the ATEval2Go app - a tool for Assistive Technology evaluators to streamline the process of making evaluations and recommendations.