KNiEVEL77
You haven't searched hard enough. There are pictures published but they do not show enough detail to satisfy the purient interests of the tabloids. A dot of light falling from the sky in the distance doesn't hold the same interest as close up shots of the tail and rotor blades sticking out of The Clutha roof.
CCTV cameras are primarily focused on areas of interest on the ground where most crime is committed. Passers by would have no more than a few seconds to recognise a developing situation, get their camera or phone out and try to obtain a photo or video.