'Home Video' effect

As the majority of our footage is handheld and mostly flashbacks of Ellen's story, we want the viewer to understand that the characters were filming some of the story on their own 'home video' cameras, which would probably be from their phones. To create this affect we will probably put this red record button on top of parts of the trailer. We were inspired by Paranormal Activity as they have the times at the bottom of the screen for their filming.