Rocketry is a fun and educational hobby!
The little E 22 CTI 24mm 1-grain reload worked perfectly with a 5 second delay. The camera is the keychain digital camer model 808 #16 model. The holder is a 3D printed shroud that can be easily attached to a 2.0 inch diameter body tube.
The web link is: http://additive-aerospace.myshopify.com/collections/video-camera-shrouds/products/808-16-camera-shroud
and the creator is Andrew Diehl. He can be contacted at Andrew@AdditiveAerospace.com