Portugal Ghost

I received the video by email from a friend who said that some strange things were happening at the company he works for, in Porto. He told me they came in the morning to work, to develop and find strange things, open drawers, fallen objects, leaves scattered on the floor.
By the signs they found, they thought it must be some animal that at night, entered the company and messed things up, so one day they decided to leave a video camera to see if they understood what was happening during the night.
When he arrived the other day he saw the video: S and were amazed.

He told me that he and his colleagues were scared by what they saw, so was I: Y