In Chapter Seventeen, what are Shana, Malik, and others trying to convince Bri to agree to that they believe will help their activist aims?

In Chapter Seventeen, Shana, Malik, and others are trying to convince Bri to let them release the entire video that shows what happened with Long and Tate when they used excessive force on Bri in throwing her to the ground. They believe the release of the full video will prove that Long and Tate were in the wrong and that Bri had done nothing to deserve what they did to her.