5 Use a Third-Party Video App
This is more of an optional step, but it can have a great impact on the video quality you record. Apple’s built-in Camera app is perfectly capable, but it lacks some of the in-depth controls that some third-party apps have — like adjustable camera resolution and bitrate, and manual white balance control
There are a range of options, from higher-end applications like Filmic Pro (currently available on the App Store for $14.99) to free options like ProMovie Recorder. Again, these third-party apps are not strictly necessary to shoot great video, but they will expand the range of options and controls that you’ll have.