rod [rod]
noun
1. Cryptozoology. A term used to refer to elongated artifacts in the form of light-rods produced by cameras. Videos of these objects moving through the air have been alleged to be alien life forms, "extradimensional" creatures, and/or very small UFOs. Subsequent experiments have shown that these objects appear in film because of an optical illusion (often created in interlaced video) and are typically traces of a flying insects, bird, and bat wing beats-- hence why these cryptids are often spotted near caves and other areas frequented by these creatures.
EX. Is the picture up top a "rod?" Short answer. No. Long answer. There are a number of more plausible theories that could explain the image; it could be an error or malfunction, something on the lens, a piece of an aircraft, or some other sort of earthly object trapped or falling through the atmosphere like a kite. Must acquire more information...