There are a lot of videos posted by mellowb1rd user on youtube about poltergeist activity in his home. This is one of them. He has good good rating on almost all of his videos? Are his videos real, if fake, how are they fake?
TL;DR: This is poor evidence of poltergeists. It is (almost certainly) a fake.
We need to consider which of the following two conjectures to believe:
1) The user MellowB1rd is completely honest. He is showing an accurate recording of poltergeist activity. That poltergeist recording demonstrates direct contraventions of our best understanding of the universe - including straight-forward physical laws like Conservation of Linear Momentum. The poltergeist theory also directly contravenes our understanding of Physicalism of the Mind. Despite these results overturning so much of what we know about the universe, they can only be observed through an anonymous person's kitchen, via their camera on YouTube.
2) That user MellowB1rd is a top-grade troll. He uses any of a number of plausible special-effect techniques which have been proposed by his critics on YouTube (Here as some. MellowB1rd himself summarises a few), from as sophisticated as CGI or compressed air lines, to invisible wires and kicking over chairs from behind the camera.
(I couldn't say which techniques he uses, but I notice that his own rendered logo on YouTube implies he has more experience with CGI than his claimed occupation might suggest.)
As skeptics, we can see that there has been a lot of high-quality evidence gained over the years for the physical laws. Anyone claiming they are wrong is making an extraordinary claim and needs to provide extraordinary evidence to the point that believing that there is no such things as poltergeists would be more obtuse than believing there is no such thing as Conservation of Momentum. Easily faked YouTube videos does not constitute such evidence.
We should provisionally accept that MellowB1rd's videos are fake.
This is Fake
Then I looked at this other videos, In this video, two cameras are used to shoot a scene. From the way the doors opens in the bottom right camera, it has to be somewhere in right side in the top video camera, but that angle does not make sense.
I will improve this answer a long the way, this is incomplete yet. Or anyone can improve it, I have made it wiki.