Recovered video can't be played?

I have accidentally deleted a video on my windows 7 (originally taken on my Nikon camera), and I recovered it. The problem is that none of my video players (vlc, wmp, etc) can read it. Before the recovery, it could be played. Then, I figured out that in the file's "properties" on the third column, there were no data except for the name, size, location, date, etc.
How do I fix this and make it playable?

Downlaod latest video codecs and instal it your pc… I think it is the best method to play such files…

Just read the below tutorial for that. That will give you the reason