I have an a6500 and while filming an interview the battery died. One video file out of 4 will not open even though it says it is 8 gigs in size. I was reading that some other people have gone through this however no real solution to save the file. Can anyone help me with this. These are very important files. I am baffled that Sony doesnt have a resolution or a safeguard against this happening. Thanks so much in advance for the help.