Practical production.
WHAT YOU ACTUALLY NEED
A phone with a decent camera Adequate light Reasonable sound Something to hold it steady
WHAT MATTERS MOST
Sound.
Viewers tolerate imperfect picture. They do not tolerate bad sound.
HOW TO IMPROVE SOUND
Record somewhere quiet Get the microphone close to the speaker Avoid rooms with echo Use a simple external microphone if you record often
LIGHT
Face a window. Do not stand with a window behind you.
Natural light is sufficient for most purposes.
STEADINESS
A tripod, or rest the phone on something.
Handheld video is tiring to watch.
FRAMING
Fill the frame with the subject Keep the background uncluttered Shoot horizontally for most purposes, vertically for platforms that expect it
WHAT NOT TO WORRY ABOUT
Professional equipment Elaborate editing
WHAT VIEWERS CARE ABOUT
Whether they can see and hear it, and whether it is useful.