I watched the video and it's a fake! If you run it fast, you"ll recognize a cut before the ghost enters the wall. If you run it slow, you'll see that it enters in a different height, than it is supposed to when looking at the flying curve!

I doubt that this video is real! And the shadow is very perfidious!

But don't get me wrong, I am amazed how many people have experience in this field and I am sure that there are things going on, not everyone can see! I just don't trust videos on that subject, as there was no proven videotaping of a ghost anywhere in ther world up to now, that I have heard of.