PDF to video lesson
Course PDFs are where studying goes to stall.
It's forty pages. You read the first eight properly, skim to page twenty, then highlight things for a while because highlighting feels like progress. Two hours later you've touched most of it and retained almost none of it.
The problem isn't effort. It's that reading a dense PDF is a terrible way to understand something for the first time, and everyone does it anyway because it's the file you were given.
What this does
You drop in the PDF. Lecturly reads it, splits it into the topics it actually covers, and builds a narrated video lesson for whichever one you pick. Usually about four minutes.
It also builds a study sheet, a flashcard deck, and a practice quiz from the same file. Those don't need a video first. If all you want is the flashcards, upload and go get them.
What kinds of PDF work
Not all PDFs are equal here, so it's worth being specific.
| Type of PDF | How it goes |
|---|---|
| Lecture slides exported to PDF | Works well. This is the main case. |
| Typed lecture notes | Works well, often better than slides. |
| Textbook chapter | Works, though it's long. Take one topic at a time. |
| Journal article | Works for the argument, less so for the methods section. |
| Scanned pages, image only | Doesn't work. There's no text to read. |
| Handwritten notes photographed | Doesn't work yet. |
The rule is simple: if you can select the text with your cursor, Lecturly can read it. If you can't, it's an image and there's nothing to work with.
Why not just ask a chatbot about the PDF
You can, and for some things you should. If you have one specific question, asking is faster than watching anything.
Two things are different here.
You get an explanation you didn't have to ask for. Chatting about a document requires you to already know what you're confused about. Quite often you don't. You know the chapter didn't land, not which paragraph broke it. A lesson that walks the whole topic finds the gap for you.
It doesn't drift. A chat answer pulls from the model's general knowledge, which is usually right but sometimes quietly isn't your course. Lecturly builds from the file you uploaded. If your lecturer uses different notation or a different framing than the standard one, that's what you get back.
What comes with it
- Captions, on by default, with the current sentence highlighted as it's spoken
- Chapters, so you can jump to the part you care about instead of watching all of it
- A chat beside the video that knows where you're paused, so you can ask about the bit you just heard without explaining the context
- A share link, if you want to send the lesson to someone in your course
Where it falls down
Very long PDFs need splitting. A 300-page textbook is not one lesson. Lecturly breaks it into topics, but you're picking them one at a time, and that's a series of sessions rather than an afternoon.
Dense notation. Heavy maths and chemistry notation comes through, but a long derivation is still better watched on a whiteboard than generated.
Scanned documents. Covered above, but it's the most common reason an upload fails, so it's worth saying twice.
What it costs
Three lessons free, no card needed. The study sheets, flashcards and quizzes have their own free allowance and work without generating a video.
Start with the PDF that's been sitting open in a tab for a week. If it works on that one, it'll work on the rest.