Product demo videos, made from a sentence
Give it your app's address and what to show. Out comes a narrated 1080p demo with a moving pointer, camera moves and captions.
For this kind of video
A product demo usually costs a morning: write a script, record a take, fumble a click, record again, then trim and add captions. SayScreen does the whole loop from one brief. It opens your page, reads what is on it, writes a short narration, and shows you the script before anything is recorded.
When you approve, an AI voice reads the script while the pointer moves through the flow you described. The camera zooms to what is being said and settles, like a Screen Studio export. Each spoken word lights up in the captions. The result is an mp4 you can put on a landing page, in an email, or in a sales deck.
Because the video comes from a brief rather than a recording, updating it after a redesign means running the same brief again, not booking another morning.
What you get
A script you approve
Read and change the narration before a frame is recorded. Nothing ships that you have not seen.
The look of a polished export
A rounded window on a wallpaper, eased pointer paths, a click ripple, zooms that follow the narration.
Captions built in
Word-timed captions burned into the video, so it reads well with the sound off.
Landscape or portrait
A 16:9 demo for your site, or a vertical cut for social, from the same brief.
Another example
0:55Connect an ESPN league“Connect a mock ESPN league with a mock draft id, then show where the draft happens.”
Questions
Does it work on my app if it needs a login?
Yes. Public pages are recorded directly. For a page behind a sign-in, the free Chrome extension saves a copy of the page from your own browser and SayScreen records that. No password is ever typed by the app.
Can I change what it says?
The script is shown before recording. Edit any line, or rewrite the brief and let it try again.
How long does a one-minute demo take?
About as long as the video to record and as long again to render, so a few minutes.
What does it cost?
The app is free, with a built-in writer and voice that cost nothing. Bring your own Claude and ElevenLabs keys for the best voices; a minute of video is roughly 17 cents in API fees.