DemoPolish

DemoPolish takes a screen recording of a software product and returns a polished demo video. You upload a recording from a tool like Loom, OBS or QuickTime, and the service rewrites the narration script, records an AI voiceover and assembles the finished video. It is aimed at software makers who want a presentable demo without editing skills or re-shoots.

After the video renders, an editor lets you click a single line that sounds off, edit the words, hear the new voice and re-voice only that line, leaving the rest unchanged. You can also swap the voice or background music across the entire video without losing the script, and the finished video keeps running to the end of your original footage rather than cutting off after the final spoken line. Downloads stay available while a fix is processed.

DemoPolish is a hosted commercial service that advertises a short paid trial rather than a free tier. The site also publishes a blog, an FAQ and a contact page, and videos can be downloaded from the editor while changes are processed.