Zaption is a tool for creating video-based quizzes. Unlike some services like TED-Ed that have students watch a video then answer questions at the end, Zaption allows you to display questions for students to answer as they watch a video. To create a quiz on Zaption you start by creating a "tour" in your account. A tour is a combination of videos, images, and text arranged into a sequence. View an overview from Jennifer Carey wrote a great overview of using Zaption in the classroom.
IF you need help, don't hesitate to ask, and be sure to look at the zaption free gallery to find some zaptions already created in your content area.
I found a great gallery for Mrs. Morris and her Holocaust Class: HERE