I use vplayer https://play.google.com/store/apps/details?id=me.abitno.vplayer.t&feature=nav_result#?t=W251bGwsMSwxLDMsIm1lLmFiaXRuby52cGxheWVyLnQiXQ.. and it hides the softkeys. I have tried mobo and mx player, and find vplayer to be the best. Rarely hear it mentioned.MX player hasn't been hiding the soft keys for me, just makes them turn to the little dots.