I have a samsung ultra s20. I can record a video for 35 minutes and upload to Facebook and it is good but if I record more than 35 minutes and upload to Facebook then it plays good for 35 minutes and then the sound just goes away but it keeps playing. Can someone please help. I have tried it on my husband iPhone no problems, I deleted Facebook and reinstall the problem still exist. I have recorded two videos and then merge together still does it. HELP!!!