For example, if you're driving and you notice you are being tailed, and you say 'Glass record' and you look down at your speedometer, and up at your rear view m

For example, if you're driving and you notice you are being tailed, and you say 'Glass record' and you look down at your speedometer, and up at your rear view mirror, and then record the entire traffic stop. Is that video admissible in court? I wouldn't think so. It's a very short distance from here to "notice you are being tailed, slow down, say 'Glass record'"