I know you've almost certainly checked this but just in case, do you have you checked in each folder? My videos seem to always go into the Park folder and not the video one.
Thanks for help.
What SD card do you use? If it is larger than 32GB, please link camera to your phone via App, and access APP to format it. that is necessary.
If it is small SD card, please change one to see.
When it is recording, Recording LED is flashing once per second, does it do that?