Video transferring from phone to computer problems - Help!

[nightfalls]

Hi,
I’m not new to transferring video back and forth from phone to computer, but I’m baffled right now. I videoed my son nativity play today which I set to record on the phone memory and recording was completed using .mp4 which I can play back with no problem on the phone. The total video is approx 15 min and 2.4 GB. I then tried to transfer it to my computer using both Kies and copy and paste and they both transferred a file that was unable to be played. I have video converting software that can’t recognise the file either! I’m total lost as to why it is happened.
Does anyone have any suggestions that may help??

Thanks.

[Doomed]

Replied in your other thread, if it is yours My memory only lasts to what I last read or saw.