Ask HN: How to show off new product with video

We're looking into a way to show off our new product to our clients by using a video capture tool (windows). We're aware of CamStudio, TinyTake, Camtasia, but we're not sure if that's the way to go.

What's the modern way to show off a product? Seems like a lot of people these days are embedding gifs on their landing page, but we'd like to have some audio to explain some features since our clients are not too computer-savvy.

What do you recommend?