The thing that you observe occurring on this video footage is a individual known as Robert Van Den Brook, that is a medium and supposedly has communication with ETs, recording on his own during meditation, but once this footage is played in reverse it reveals imagery of entities emerging. Robert describes it as a a quantum field effect.

Google translation:

Robbert was some time ago that there were also images appear on video. This is in front of a cameraman happened. Robbert was understood that this may happen through him to mankind to prepare for extraterrestrial contact and let them adjust to their different appearances. The energy / presence granted or choose an image that best matches their appearance, they are likely (as in the photos) from "the field" borrowed. These creatures have a beneficial, therapeutic effect on people.