If you're using the game capture feature on Lowkey but all your recordings show "Looking for a game to record..." instead of your gameplay, the fix is pretty easy. (Sorry for the occasional stray background noise; that's wfh life for ya!)
Here's the file path mentioned in the video:
%LOCALAPPDATA%\Programs\lowkey-desktop\resources\native\osn
NOTE: If you upgraded to V3 from V2, your file path may be this instead:
%LOCALAPPDATA%\Programs\lowkey-electron\resources\native\osn