Newbie asks, why Mini SE does not record video longer than 15-20seconds, turns it self off after that..?

That usually means the SD card is getting too full of the card itself is not fast enough. Try copying off all your clips and re-format the card in the aircraft.

Hello there Eddy_fin. Good day and thank you for reaching out. May we please know what is the specifications of the microSD card that you are using please. In addition, the maximum capacity of a single file will not exceed 4GB. If exceeded, the recording will be stopped, and a new recording will be started. In addition, the maximum file size of FAT32 is 4GB. Hence, a file that is larger than or equal to 4GB will be divided, otherwise, the file may be lost or abnormal and cannot be read. Although exFAT allows a larger file size, the larger file may be damaged due to abnormal power-off and SD card removal, or even cannot be recovered. So the storage of the camera is 4GB regardless of the file systems. So it is normal the video will be split if it reaches 4GB. Thank you.

Hey, thanks for your replies!
I had an another sd-card which was on list of recommened sd-cards for the Mini SE and put it on use, now working like a charm. So, i just used closest on hand ja did not work out properly.
Should always read/do your homework FIRST.