If it was an infrared beam (which it would have to be, since that is the focus of all research in that area since the 1970s), neither you nor a camera would "see" any light from a scattered beam.
And if it were a weapon-class laser, the odds would be high that anyone who saw it directly or semi-directly would be blinded by the radiation. Zap yourself in the eye with a laser pointer and find out what 5 milliwatts looks like. Nothing to repeat.
If it was an infrared beam (which it would have to be, since that is the focus of all research in that area since the 1970s), neither you nor a camera would "see" any light from a scattered beam.
And if it were a weapon-class laser, the odds would be high that anyone who saw it directly or semi-directly would be blinded by the radiation. Zap yourself in the eye with a laser pointer and find out what 5 milliwatts looks like. Nothing to repeat.