I’ve been recording and editing how-to videos for years. I’ll use either my iPhone, iPad, or a Logitech Webcam.
Here is a suggested list of what you could use to get started. These links are either Amazon or to a post right here on my blog, and I use everything listed.
iRig mic is made for iPhone/iPad and plugs into headphone jack
This microphone is designed specifically for the iPhone and iPad. I’ve been very satisfied with the quality. Order the windscreen that you’ll see with it. This helps to reduce wind interference when you say words beginning with “p”, for example.
Microphone arm. You’ll need something to hold the mic. I’m currently using this space saving mount so I no longer need a floor tripod.
Desktop Tripod for the iPhone or iPad. You’ll also need a tripod mount to hold the iPhone. If you ever decide to use the iPad, you could do that too, but you’ll need a unit to slip the iPad into so it’ll attach to this mount. I have the iPad 4 and use this tripod mount.
Bluetooth wireless remote. This Bluetooth wireless remote will start and stop the video app without your having to tap your device. You’ll have to use Bluetooth as opposed to a selfie wire that plugs into the headphone jack (because the microphone will be there).