The best way to have students avoid accidentally using copyrighted images or videos in their own projects is to use media that they’ve created themselves. One of the strategies that I frequently recommend to teachers as a way to help students avoid any copyright issues in their work is to use media from a classroom b-roll gallery. You can build this gallery by having students contribute pictures, video clips, and sounds to a shared Google Drive folder. In the video below I demonstrate how to create a shared Google Drive folder.
Even if you do create a b-roll gallery for your classroom, there will still be times that you and or your students need to search the web for images and videos to re-use. In this short video I provide an overview of a few good ways to do that.