I had noticed that media manager is a pain but if you open it then minimize, open my computer then open storage folders you will see all your stuff, i made a folder for movies,music,pics and then i just drag/drop into them. all my movies are simply converted to mp4 and they play great!
just got my storm last night and am loving it big time, no big lag issues, rotates within a sec and camera works great. now i am glad i didnt get one on release day since i dont see most any of the problems that others have been having, not going to even update until official comes out.