In the TNG Season 4 episode "Identity Crisis", La Forge is in a race against time to figure out why he and some former crew mates from the USS Victory are changing into
weird blue glow-in-the dark chameleon-like creatures.
The suspicion is that they came into contact with something on the planet Tarchannen III some years prior during an away mission. La Forge conveniently spends a lot of time studying footage from the away mission, which was taken by one of the other officers using a GoPro-style head mounted camera:
The needs of plot aside...
Have we seen this before? At what point did it become (or cease to become) standard procedure to film away missions?
Does it have to do with the nature of the mission (which was to investigate the mysterious disappearance of individuals stationed on the planet)? What is the general protocol regarding visual records of away missions?