The Pitch
This video is wasting your bandwidth.
Every second you watch costs LinkedIn storage, CDN traffic, and your data plan.
For what? To show you some text and a voice.
Most online courses are exactly this.
Text on slides. A voice reading it. Packaged as video.
Ten minutes of 1080p video
500 megabytes.
10 minutes of narrated slides with the same information?
Under 5 megabytes.
So I built something different.
An instructional course that exports as a static website.
Every word is real HTML.
- Search engines can index it
- Screen readers can read it
- You can select and copy any text
- It works offline as a PWA
No platform owns it.
No Udemy. No algorithm. No monthly fee.
One folder. Your server. Runs forever.
How it gets made
Write what you want to teach.
An LLM structures the slides.
Local TTS narrates the voiceover.
Align the timing. Export. Done.
What you just watched?
Built with useful.
The whole thing?
A text file and some audio clips.
Courses shouldn't be video files.
They should be websites.
useful
Open source. Self-hosted. AI-native.
codeberg.org/ohmstone/useful
Link is in the comments.