---Original Title: need help asap plzzzz---

I had done with some editing on windows movie maker on 5 different videos, when I had done with them all I had saved all in one file and then i tried watching them on windows media player but it then said that its not supported then i see that the videos formats have changed to a wlmp type of file which before they were something and now they wont work in windows movie maker either or on any other video player, i need help on this urgently please, and the amount of memory on the videos have gone down to 'kb's' before they were 'mb's'.