4 Use a Gimbal
Nothing can ruin a video quicker than shakiness. It’s one of the most noticeable differences between professional video and amateur home movies. And while the iPhone’s optical image stabilization is great, it won’t do much good with really shaky footage. Luckily, it’s an easy fix: use a tripod. There are tons of great smartphone tripods available online.
If you’re trying to record a moving shot — such as following a subject down a street — use a gimbal. These are handheld mounts that can easily stabilize your video recording while on the move. Many options are inexpensive, and the difference between gimbal and non-gimbal footage is like night and day.