People are turning to audio and visuals when it comes to technical subjects. However, you should consider doing an ebook first and turning it into an audiobook through a resource like Audible's ACX platform. You can hire a producer either through a royalty share program, so you don't have to shell out upfront cash, or you can do a pay-per-hour hire as well.
Use your personal words & experience with the product. Your own content, or photos & videos of yourself using the product are always the most effective. For example, many affiliate programs provide swipe copy to their affiliates which is pre-written emails, post material or social media posts. These can be helpful as a guide, but they often scream swipe copy, aren’t written in your voice (the one your readers know!) and if a lot of affiliates are using it, are overdone.
how affiliate marketing works infographic