Lecture slides to video
A slide deck is not a lesson. It's a set of cue cards for the person holding the clicker.
That's not a criticism of your lecturer. Slides are supposed to work that way. They're prompts, so the speaker remembers the order and the audience has something to look at. The actual teaching happens in the gaps between the bullets, out loud, and it's gone the moment the room empties.
Which is why opening the deck a week later feels so useless. You're looking at the prompts for a talk you can't hear.
The specific problem
Open any deck from your course and you'll find slides like this:
Diminishing marginal returns
- Fixed input constraint
- MP falls after a point
- See graph
Everything you need to answer an exam question is missing from that. Why does the marginal product fall. What's being held fixed and why that matters. What the graph is showing and where the turning point comes from.
Your lecturer said all of it. It took maybe ninety seconds. It isn't in the file.
No summariser can give it back to you. You can't compress four bullets into an explanation that was never written down. The information isn't there to extract.
What Lecturly does instead
It generates the explanation rather than pulling it out.
You upload the deck. Lecturly works out what each section is teaching, writes the explanation that would have gone with it, and turns that into a narrated video with visuals built to match. Around four minutes a topic.
So for the slide above, you get someone talking you through why the marginal product falls, what's fixed, what the graph shows, and what the turning point means, with the picture being drawn as it's described.
How it handles a deck
- Upload the .pptx or the PDF export. Both work.
- It splits the deck by topic, not by slide. A twelve-slide deck is usually three or four actual ideas, and you study those one at a time.
- Pick one and watch. Captions on, chapters down the side, scrub back as much as you want.
- Ask about any part of it. There's a chat that tracks where you're paused, so you can ask about the thing you just heard without setting up the question.
Being honest about the limits
It needs something to work with. A deck that is genuinely twelve words and a stock photo doesn't contain a lesson, and Lecturly won't make one up to fill the space. If your slides are that thin, pair them with the textbook chapter or the reading list, and upload that instead.
It's generated, so check it against your course. The explanation is built from your deck, which keeps it close to your material. It's still generated text and it can be wrong. Treat it like a very good study partner explaining a topic, not like your lecturer's own words. Where it matters, check it.
Long derivations are not its strength. Formulas are fine. Fifteen-step proofs are better on paper.
If you already understood the lecture, this is the wrong tool. You don't need the explanation again. You need to be tested. Go use the flashcards or the quiz, or use Anki, which is free and better at drilling than anything we make.
What else comes out of the deck
Uploading once gives you all of these, and none of them need a video:
- A one-page study sheet: key terms, the core ideas, the mistakes people make, and questions to test yourself
- A flashcard deck that tracks what you've got down and what you keep missing
- A practice quiz, graded as you answer, where the questions you get wrong link back to the part of the lesson that covers them
That last one is the useful bit. A score tells you almost nothing. Knowing exactly which three things you don't understand tells you what to do tonight.
Try it on your worst deck
Not your best one. The one you've opened four times and closed again.
Three lessons free, no card.