After some recent dives, I realised that the videos we recorded were being overwritten.
On further Investigation I saw that in the latest update of Qgroundcontrol the default video storage had been set at 2048 MB. Even after increasing the memory allowance to 20GB, it still seems to only allow the 2048 MB in that folder. The computer has plenty of storage space so that should not be a problem.
Is there any way to either change the folder destination of the recordings or, fix the issues with the assigned storage?