There have been some oddities that could have a viable explanation excluding the paranormal. What intrigues me the most is that these people have been doing this for a long time and inevitably, when something is heard or seen, they go into a sort of "shock mode". It seems to me that one would become used to such things and investigate them from every angle, ruling out virtually everything that could have made said noise or shadow. Leaving night vision devices in static positions and not entering the "hot spot" until the end of the investigation, particularly if noises are coming from that area, just let the cameras roll.
Finally, forget all of the "animation" used to get viewers "prepped", Facts count, creepy/crawly animations show me how easy it is to preprogram the audience and are unnecessary.