Thanks but unfortunately doesn't work for me. When I connect Fire to PC via USB and enable file transfer on the Fire I only get SD Card in Windows Explorer. This is probably because The Fire is set up as merged storage as recommended when I ran through the setup.
Searching the entire SDCard doesn't find the files.
I was able to connect it via Bluetooth, browse through Storage in Settings and locate the particular video I wanted. I was then able to share that to my laptop. Except.... bizarrely, it sent a jpg still of the video not the MP4!!
I have now tried another option on the video itself to upload to cloud. Problem is I have no idea where that can be found!