This is a video of a car accident in Portugal, supposedly caused by a ghost. There are lots of posts on the internet about the authenticity of the video - so if you google Teresa Fidalgo you can check for yourself. If you liked 'Blair Witch' you'll love this.
This is one of the more rational posts about the video :- sOulless
It's amazing how many people believe or want to believe that the video is real. Some people are just SO gullible. I must check out more of David Rebordão's videos.