Previously, every time I launched a new product, I had to create a video demo to show the users how the product works and often end up with many versions from various angles. Those are tedious and yet hard work since operating the product while explaining how it works precisely according to a script is not easy. There were many back and forth. Once that's been done, editing the video is another time consuming part, not to mention putting together the voiceover(VO) and background music (BGM) which basically requires a professional studio team to come out one.

Nowadays Claude Code Opus 5.5 and the like can do a decent job by creating a product demo which is a good start. But the AI smell is very strong. And the biggest pain happens when we want to update some part of the video since the AI video generators typically fixes one part but breaks another. So the back and forth is still there.

That's why we build Fluxcut (fluxcut.dev) with a product demo video engine as the filming studio putting together scripting, timeline arrangement, footage section, voiceover, background music and thumbnail so that creators have an all-in-one solution for the product demo.

While we design the engine of product demo video, we do not exclude the status quo agent such as Claude Code which are very powerful. I personally often ask Claude to apply the Fluxcut plugin (https://github.com/Flux-AI-Agent/fluxcut-plugin) to come out an initial version of the product demo quickly. Then I can tweak those parts that requires further improvement. This practice makes creating product demo videos so easy and so much fun since the process is not a blackbox for us and we can involve with any part we want!

It's also very easy to update some part of the video, whether it's the script, footage, VO or BGM, since every part is just at hand and ready to be edited. The cool thing is editing some part does not necessarily affect others and things often follow through very well.