Lost Video tmp file

I was recording video on my amazon fire phone , when i got a low space message.This meant the video had stopped recording.I decided to carry on making the video.
However, in my files i can only find the the continued recording , the original recording that stopped is nowhere.
i have had low storage message during recording before but it has still recorded and saved.
It is not in Google or Amazon Photos.The only thing i could find in es file explorer relating to it is that it is mp4.tmp. However, when i now try to look for it i get 0.00 size on phone and confusingly when i look at it via pc i get the size it was 1gb- but it is listed as a mp4 and confusingly the tmp is in properties - and i cant change extension from there.And also it wont allow me to copy it my pc

 

What does the manual say when if recording you continue when there's no space left.As it sounds to me it automatically over writes the previous

 

Haven't got manual - but like i said it has saved recording on previous occasions.I have a tmp file which can't be copied or extension changed

 

You said it yourself in the first post.The only recording you have access too is the later part.Where is the first part supposed to be stored if there's no room left for more data ? without the manual available (unless free manuals online or youtube) the only logical conclusion is its gone,otherwise there'd be no second part.As for you've done it before..lol..question is was it for as long,obviously not,otherwise you'd face the same issue.Simply test the theory & see what happens when recording it stops & you continue for the same amount of time you did for this recording.
low space & no space are not the same thing

 

This was the file -it seems to disappeared few hours after i found it.(it wouldn't do anything).Searches are not finding

 

Odd, showing my pc .Try again

 

Trying with Recuva, but it is not picking up phone (even though pc does)No drag/drop , or right click function either.Unless you know of a better one ?

 

Doesn't make any difference plugged in first , or after - not finding it