Import video’s iPhone via Sd-cardreader

Hello people I need some advice : when I connect the sd card to Lightning reader to my iPhone 11 and insert the sd card from my DJI Osmo Action 3 camera, the import icon appears in my photo app. When I tap the button to import my video’s it says there are no video’s? However I do see my sd card in the file app where I can find the video’s in the DCIM map on my iPhone. Any solution to import directly in my photo app via the import button? Appreciated