Your iPhone already comes with everything you need to record high quality video. With a light and microphone, you will be able to increase your production quality. The NITECORE NCR10 is a stainless steel and aluminum video rig with 12 x 1/4-inch screw holes and 4 cold shoe mounts. It has adjustable dual handles and supports vertical and horizontal shooting.
The NCR10 also lets you record video with one hand or on a tripod. It has a multipurpose phone mount with clamping range of 2.28 to 3.54″. It can be used to shoot with multiple smartphones or to simply hold a powerbank for your phone.[where to get it]