Video shows people vexed by earthbound spirits, possessing their bodies or, at least, being under the influence of something that is causing their odd behavior.
Warning: Some of this video may be difficult to watch and quite frightening.
In Western culture, especially due to the influence of the Bible and its misinterpretation by some forms of Christianity, such behavior is often incorrectly believed to be caused by demons (the demonic). However, ghosts can, sometimes, remain earthbound for a long time, remaining in fear. Some of those disembodied people can be troublesome, disrespectful and dishonest -- likely that same way before they died. Such people may trick, frighten, or even attack others. This type of person is a negative entity, a vile person who does not show concern or care for others when in such a mental condition.