I'm sceptical of these happenings. Because, I have yet to witness such things. Plus thing's on video now a days are so easy to fake. But I have heard about spirits attaching themselves to thing's they lived and cherish as well as magicians or practitioners trapping spirits in items as well. As to why a lot of the time they hard to record, and dont like to be recorded OR our species getting evidence of them maybe its due to the fact that if we can trap them in objects they dont want to be trapped, Or they dont want proof that they exists. Do you blame them, we are a crazy species. At least a lot of us are. That's my take on it. Again Im just going with my gut.