I extract DVD and You Tube video music to audio save by MP3 and video format to MP4 or M4A and save in external 32GB mini SD card but I can not play music or video. I use default video player in my smart phone LG Otimus One PG500 (Androit 2.2 OS ) and Meridian player (downdload from androit market) but still can not play some of them but not all.Some body know help me this matter.