Perhaps I haven't quite grasped what you want but couldn't you do most of it by using a camcorder pointed at your screen and then talking into the microphone? You can afterwards edit it using standard video editing software.
Xiaomi Mi Mix 2 review
What went wrong at the Designs of the Year 2017
iPhone X news: Release date, price, new features & specs
Comment créer, modifier et réinitialiser un compte Apple ?