Does your school have a Discovery Education subscription? This is a good video, titled Basics of Physics: Exploring Gravity. It is about 18 minutes long and covers a lot of the big ideas about gravity. I am using it for middle-school, although it would be suited to an introductory physics class as well. This is a "cloze" style worksheet that asks students to watch the video and fill in the blanks in sentences. Be sure to pre-load the video to students' assignments folders, although the worksheet also has instructions that will allow students to find it by conduting a DE search.