Sirious help needed

i need realy much help and i dont know if this is the right topic to post it but ok. i wana make a movie of my game i made called Lotr builder and i wana put that movie on youtube the problem is i dont have eny idea how to do that and i think replays shall not work i just wana make a profesional movie of it like making it in movie maker but i cant inport replay files of wc3 in movie maker plz somone help me i give +rep if it helped

Record it with a record program like hypercam or camstudio...
Then send the movie file over to WMM

As Kohuded said, use a video capturing program, I recommend fraps, then import the saved clip into a video editing program(I recommend Adobe Premier or Sony Vegas, but unfortunately they are expensive) and simply upload your edited video on youtube.