I accidently master reset my Sony Ericsson W810. Now I lost the demo tour video. I found the video from a web site as Demo_Tour.mp4. Now I don't know how to restore it in the phone. I tried many ways by copying it to phone memory but the Demo tour in Entertainment remains grey and says the video has been deleted. So pls help on recovering the Demo tour video back again to its previous state. 

Lands Phones - Ericsson