I am experiencing the same thing. My Samsung Galaxy 7" tablet doesn't have a checkbox for "automatic date & time". See attached. Please help! I have an app I need to use that requires "automatic date & time" be turned on, but I cannot turn it on.
I just got a Google Pixel and am having the same issue. A saved MP4 from snapchat will not upload to Instagram no matter what I do. Did you have any resolve with this?