DLL load failed when importing a self-built cv2 library in python

I already added the Gstreamer directory, as well as the build folderpath that contains the opencv_videoio.dll to my PATH env var, but it still wont load the DLL file.

I’m fairly certain that the missing DLLs (or maybe just singular DLL, the opencv_videoio.dll?) is not related to the Gstreamer.

I’m wondering if this has anything to do with the partially successful build?