I am not quite sure about loading the movies after the ‘player options’ and ‘player naming’ screen, however i believe going into ‘Project Settings’ and looking at ‘Movies’ should help, at least with the start up movie. Hope this helps.
://i.gyazo/3697110b2e160e44e77ebfecbe73333a.png
At a second look, maybe there is a ‘play’ node in blueprints that may help? Maybe ‘Play’ cinematic? I dont know, sorry,. Hopefully someone else can help more.