Make a videoscore for youtube out of my musescore files

Hi, can you help me please? I am desperately looking for the possibility (EASY TO DO!!) to save or export my musescore files to a videoformat that I can publish on youtube. My choir needs them to rehearse their parts. I became pro member to be able to do this, but I cannot find the how to do this... Please anyone send me an outline of instructions. The singers are waiting for me to deliver the videofiles :)