I dont have a capture card, and i assume emulators are banned (Tho i dont even know if there is a 3ds emulator), so i have to resort to camera footage. However due to the quality of my camera, i can only capture 1 screen, the other being glared. Is it enough to capture only the top screen as proof?

Yes, as long as we can see what's going on, you are absolutely fine with that :)

thank you