I recently analyzed some SpaceX launch footage (a Starlink deployment on September 3). I noticed a switch in camera perspective at T+00:02:20: from cameras on the ground to those attached to the Falcon 9.
This got me wondering: Launching a secondary, smaller rocket (or maybe just a high-altitude jet) with cameras attached to it, may provide reliable and higher-quality footage of the primary rocket launch.
Has this ever been done?