No video and sound when play video

Hi. I am new here. I have blaupunkt b-stream with S905X2 rev.e. 100MB ethernet and 2GB ram. I have used g12a_s905x2_2g DTB. I installed lastest stable 21.1.1 version. When i run any movie I have black screen and no video but it shows, that it plays movie. Any ideas?