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Modern AI, taught by watching.

Drona4U AI is a catalogue of animated video courses on the AI and software engineering topics shipping right now — built so the concepts actually stick.

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D4U/RAG Tutorial/Lesson 3 · RetrievalAI

1How does RAG find the right answer?

Your question
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AI answers

It looks things up first, then answers.

COURSE LESSONS

  • What is RAG?
  • Embeddings
  • Retrieval
  • Generation
My note · 0:14
0:23 / 0:48
  • 1Concepts drawn, not described
  • 2Structured courses, lesson by lesson
  • 3Notes pinned to the exact moment
Why we exist

Why visual courses beat reading.

“Modern AI moves faster than the docs, the papers and the blog posts trying to keep up with it.”

Reading your way through dense write-ups is slow, and most of it slips straight back out of your head.

So every lesson shows it: it takes a hard concept and draws it — diagrams that move, systems that come together step by step, ideas you can actually picture.

Browse the whole catalogue for free. Create an account when you’re ready to watch, then follow structured courses lesson by lesson — pinning timestamped notes and tracking your progress as you go.

READING

Dense, slow, forgotten by Friday.

WATCHING

Moving diagrams you can picture later.

The approach

Animated lessons on what’s current.

01

Watch, don’t read

Animated explanations lodge in memory in minutes — not the hours a wall of docs takes. Seeing a system move beats reading about it.

02

Genuinely current

Topics like the Model Context Protocol and agentic AI, covered as they ship — not years later, once they are already old news.

03

Real, structured courses

Organised into lessons and topics with a clear path through each subject — not a pile of random clips to sift through.

04

Notes that stick

Pin timestamped notes to any moment in a lesson and track your progress, so picking a course back up is effortless.

Who it’s for

Built for engineers who are upskilling.

  • Developers moving into AI and ML work
  • ML and AI engineers shipping real systems
  • Tech professionals upskilling on current tooling
  • Business analysts who need to speak AI fluently

IN THE CATALOGUE

Real, current topics — covered as they ship, organised into structured courses.

  • MLOps
  • RAG
  • LLM applications
  • AI agents / agentic AI
  • Model Context Protocol (MCP)
  • Business Analysis
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