How do you make product videos?

It will take you a while to figure this out and make decent videos. For just $5 you can get a decent video made on Fiverr.

"Product video" can have different meanings. If you mean a screen recording of using the product, with a voice-over and some special effects - I used Camtasia before, and with no prior experience of video editing, I found it very easy to use. It's not cheap, but there's a free trial period.

And if you have chops in keynote, you can also use that. Which we did to make this video: https://www.youtube.com/watch?v=pFV1nh1CuwM&feature=youtu.be

Something I recently fell in love with -> https://www.screenspace.io/ (and not I am no way affiliated)

fiverr