When you pick an SD card, you should know that it bears no direct effect on the quality of any video you record. After all, the look and quality of the video depend solely on the specifications of your camera. If the camera is capable of producing 4K videos — you will be able to expect an output in that resolution. That being said, there are lots of ways an SD card can affect the quality of your work, if not the resolution of the imagery itself. Remember that a 4K video requires not only an excellent camera but an appropriately high-end and fast-paced SD card. If you fail to pick the right one, you may encounter stuttering and recording failure because your camera output can’t be received by your SD card properly. And if you buy shoddy cards from unreliable manufacturers — you’ll be facing the constant risk of general equipment failure.