I can't say that I give much credibility to orbs as being paranormal at all.
because it is far to easy to create orb photo's with any cheap camera with a flash.
dust, water light reflection can all be used to create orbs pretty much at will.
for anyone wanting to test this out you will need a spray bottle with mist spray nozzle,
and a camera. go in to a the garden when it's dark or a dark room.get someone to stand
to front and side of you so that they are not in the photo, then as they spay the mist in to the air
take a couple of photo's with the flash and you should have a photo with masses of orbs in it.
the same for dust just blow dust in front of the camera and take photo's with flash.
On the other hand i cannot say the same for moving orbs of light in video because I have never
heard of a way to create this effect on video.
You can tell if its a fly because flies have a distinct flight pattern. Dust can still be in there as a cause too
but some orbs in video travel at high speed in a straight lines like little shooting stars. Flies fly in a more random
iratic fashion not at speed in perfectly straight lines, so I am more open to moving orbs on video as being of a possible
paranormal nature.
I would like to hear other peoples views on this subject, so please post a reply and tell me what YOU think.