Full Transcript

·YouTLDR

AI Agents, Clearly Explained

10:101,698 words · ~8 min readEnglishTranscribed May 11, 2026
AI Summary

AI agents transition from being passive tools to active decision-makers by replacing human-designed logic with LLM-based reasoning and iterative problem-solving. While standard AI workflows follow fixed paths, agents autonomously decide which tools to use and how to critique their own work to reach a goal.

As AI evolves from simple chat interfaces to autonomous agents, understanding the distinction between 'workflows' and 'agents' is crucial for anyone looking to automate complex business or personal tasks.

Section summaries

0:00-1:00

Introduction

optional

General context about the hype of AI agents and the video's goals.

1:00-2:00

Level 1: LLM Basics

skip

Basic explanation of how ChatGPT works which most viewers already know.

2:00-5:00

Level 2: AI Workflows & RAG

watch

Essential for understanding the difference between a linear automated task and an agent.

5:00-8:00

Level 3: AI Agents & ReAct

watch

The core value of the video where the transition to agentic reasoning is explained.

8:00-10:00

Demos and Conclusion

watch

Shows a real-world vision agent example and provides a final summary comparison.

Key points

  • The Three Levels of AI — AI evolves from Level 1 (Chatbots: passive input/output) to Level 2 (Workflows: fixed paths using external data) and finally Level 3 (Agents: autonomous reasoning and action).
  • Human vs. LLM Decision Making — The defining characteristic of an AI agent is that the human decision-maker is replaced by an LLM that decides the most efficient way to achieve a goal.
  • The ReAct Framework — ReAct stands for Reason and Act; it is the most common configuration where an agent thinks about a problem, uses a tool, observes the result, and iterates.
The one massive change that has to happen in order for this AI workflow to become an AI agent is for me, the human decision maker, to be replaced by an LLM. Jeff Su
All AI agents must reason and act. So react. Jeff Su

AI-generated from the transcript. May contain errors.

0:03

AI. AI. AI. AI. AI.

0:07

AI. You know, more agentic. Agentic

0:10

capabilities. An AI agent. Agents.

0:12

Agentic workflows. Agents. Agents.

0:15

Agent. Agent. Agent. Agent. Agentic.

0:19

All right. Most explanations of AI

0:20

agents is either too technical or too

0:23

basic. This video is meant for people

0:26

like myself. You have zero technical

0:28

background, but you use AI tools

0:30

regularly and you want to learn just

0:33

enough about AI agents to see how it

0:36

affects you. In this video, we'll follow

0:38

a simple one, two, three learning path

0:41

by building on concepts you already

0:43

understand like chatbt and then moving

0:46

on to AI workflows and then finally AI

0:49

agents. All the while using examples you

0:52

will actually encounter in real life.

0:55

And believe me when I tell you those

0:56

intimidating terms you see everywhere

0:58

like rag, rag, or react, they're a lot

1:02

simpler than you think. Let's get

1:04

started. Kicking things off at level

1:05

one, large language models. Popular AI

1:08

chatbots like CHBT, Google Gemini, and

1:10

Claude are applications built on top of

1:14

large language models, LLMs, and they're

1:17

fantastic at generating and editing

1:19

text. Here's a simple visualization.

1:21

You, the human, provides an input and

1:24

the LLM produces an output based on its

1:27

training data. For example, if I were to

1:29

ask Chachi BT to draft an email

1:31

requesting a coffee chat, my prompt is

1:33

the input and the resulting email that's

1:36

way more polite than I would ever be in

1:37

real life is the output. So far so good,

1:40

right? Simple stuff. But what if I asked

1:43

Chachi BT when my next coffee chat is?

1:47

Even without seeing the response, both

1:49

you and I know Chachi PT is gonna fail

1:52

because it doesn't know that

1:53

information. It doesn't have access to

1:56

my calendar. This highlights two key

1:58

traits of large language models. First,

2:00

despite being trained on vast amounts of

2:02

data, they have limited knowledge of

2:04

proprietary information like our

2:07

personal information or internal company

2:09

data. Second, LLMs are passive. They

2:12

wait for our prompt and then respond.

2:14

Right? Keep these two traits in mind

2:17

moving forward. Moving to level two, AI

2:19

workflows. Let's build on our example.

2:21

What if I, a human, told the LM, "Every

2:25

time I ask about a personal event,

2:26

perform a search query and fetch data

2:29

from my Google calendar before providing

2:31

a response." With this logic

2:33

implemented, the next time I ask, "When

2:35

is my coffee chat with Elon Husky?" I'll

2:38

get the correct answer because the LLM

2:40

will now first go into my Google

2:42

calendar to find that information. But

2:45

here's where it gets tricky. What if my

2:48

next follow-up question is, "What will

2:50

the weather be like that day?" The LM

2:53

will now fail at answering the query

2:55

because the path we told the LM to

2:57

follow is to always search my Google

3:00

calendar, which does not have

3:02

information about the weather. This is a

3:04

fundamental trait of AI workflows. They

3:07

can only follow predefined paths set by

3:10

humans. And if you want to get

3:12

technical, this path is also called the

3:15

control logic. Pushing my example

3:17

further, what if I added more steps into

3:20

the workflow by allowing the LM to

3:22

access the weather via an API and then

3:24

just for fun use a text to audio model

3:26

to speak the answer. The weather

3:28

forecast for seeing Elon Husky is sunny

3:31

with a chance of being a good boy.

3:33

Here's the thing. No matter how many

3:35

steps we add, this is still just an AI

3:39

workflow. Even if there were hundreds or

3:41

thousands of steps, if a human is the

3:44

decision maker, there is no AI agent

3:47

involvement. Pro tip: retrieval

3:49

augmented generation or rag is a fancy

3:52

term that's thrown around a lot. In

3:54

simple terms, rag is a process that

3:56

helps AI models look things up before

3:58

they answer, like accessing my calendar

4:00

or the weather service. Essentially, Rag

4:03

is just a type of AI workflow. By the

4:06

way, I have a free AI toolkit that cuts

4:07

through the noise and helps you master

4:09

essential AI tools and workflows. I'll

4:10

leave a link to that down below. Here's

4:12

a real world example. Following Helena

4:14

Louu's amazing tutorial, I created a

4:17

simple AI workflow using make.com. Here

4:19

you can see that first I'm using Google

4:21

Sheets to do something. Specifically,

4:23

I'm compiling links to news articles in

4:25

a Google sheet. And this is that Google

4:28

sheet. Second, I'm using Perplexity to

4:31

summarize those news articles. Then

4:34

using Claude and using a prompt that I

4:36

wrote, I'm asking Claude to draft a

4:38

LinkedIn and Instagram post. Finally, I

4:42

can schedule this to run automatically

4:44

every day at 8 a.m. As you can see, this

4:46

is an AI workflow because it follows a

4:49

predefined path set by me. Step one, you

4:52

do this. Step two, you do this. Step

4:55

three, you do this. And finally,

4:57

remember to run daily at 8 am. One last

4:59

thing, if I test this workflow and I

5:02

don't like the final output of the

5:05

LinkedIn post, for example, as you can

5:08

see right here, uh, it's not funny

5:10

enough and I'm naturally hilarious,

5:11

right? I'd have to manually go back and

5:16

rewrite the prompt for Claude. Okay? And

5:20

this trial and error iteration is

5:23

currently being done by me, a human. So

5:25

keep that in mind moving forward. All

5:27

right, level three, AI agents.

5:29

Continuing the make.com example, let's

5:31

break down what I've been doing so far

5:33

as the human decision maker. With the

5:36

goal of creating social media posts

5:37

based off of news articles, I need to do

5:39

two things. First, reason or think about

5:43

the best approach. I need to first

5:44

compile the news articles, then

5:46

summarize them, then write the final

5:48

posts. Second, take action using tools.

5:51

I need to find and link to those news

5:53

articles in Google Sheets. Use

5:55

Perplexity for real-time summarization

5:58

and then claw for copyrightiting. So,

6:00

and this is the most important sentence

6:01

in this entire video. The one massive

6:04

change that has to happen in order for

6:06

this AI workflow to become an AI agent

6:09

is for me, the human decision maker, to

6:13

be replaced by an LLM. In other words,

6:16

the AI agent must reason. What's the

6:19

most efficient way to compile these news

6:20

articles? Should I copy and paste each

6:22

article into a word document? No, it's

6:24

probably easier to compile links to

6:26

those articles and then use another tool

6:28

to fetch the data. Yes, that makes more

6:30

sense. The AI agent must act, aka do

6:34

things via tools. Should I use Microsoft

6:37

Word to compile links? No. Inserting

6:39

links directly into rows is way more

6:41

efficient. What about Excel? M. So the

6:44

user has already connected their Google

6:45

account with make.com. So Google Sheets

6:47

is a better option. Pro tip. Because of

6:49

this, the most common configuration for

6:51

AI agents is the react framework. All AI

6:55

agents must reason and act. So

6:59

react. Sounds simple once we break it

7:01

down, right? A third key trait of AI

7:03

agents is their ability to iterate.

7:06

Remember when I had to manually rewrite

7:08

the prompt to make the LinkedIn post

7:10

funnier? I, the human, probably need to

7:13

repeat this iterative process a few

7:15

times to get something I'm happy with,

7:17

right? An AI agent will be able to do

7:19

the same thing autonomously. In our

7:22

example, the AI agent would autonomously

7:25

add in another LM to critique its own

7:28

output. Okay, I've drafted V1 of a

7:30

LinkedIn post. How do I make sure it's

7:32

good? Oh, I know. I'll add another step

7:34

where an LM will critique the post based

7:36

on LinkedIn best practices. And let's

7:38

repeat this until the best practices

7:40

criteria are all met. And after a few

7:42

cycles of that, we have the final

7:45

output. That was a hypothetical example.

7:47

So let's move on to a real world AI

7:50

agent example. Andrew is a preeeminent

7:53

figure in AI and he created this demo

7:55

website that illustrates how an AI agent

7:58

works. I'll link the full video down

8:00

below, but when I search for a keyword

8:02

like skier, enter the AI vision agent in

8:07

the background is first reasoning what a

8:10

skier looks like. A person on skis going

8:12

really fast in snow, for example, right?

8:14

I'm not sure. And then it's acting by

8:18

looking at clips in video footage,

8:22

trying to identify what it thinks a

8:24

skier is, indexing that clip, and then

8:29

returning that clip to us. Although this

8:32

might not feel impressive, remember that

8:34

an AI agent did all that instead of a

8:36

human reviewing the footage beforehand,

8:39

manually identifying the skier, and

8:42

adding tags like skier, mountain, ski,

8:45

snow. The programming is obviously a lot

8:47

more technical and complicated than what

8:49

we see in the front end, but that's the

8:51

point of this demo, right? The average

8:53

user like myself wants a simple app that

8:56

just works without me having to

8:58

understand what's going on in the back

9:00

end. Speaking of examples, I'm also

9:02

building my very own basic AI agent

9:05

using Nan. So, let me know in the

9:07

comments what type of AI agent you'd

9:08

like me to make a tutorial on next. To

9:11

wrap up, here's a simplified

9:12

visualization of the three levels we

9:14

covered today. Level one, we provide an

9:17

input and the LM responds with an

9:19

output. Easy. Level two, for AI

9:22

workflows, we provide an input and tell

9:24

the LM to follow a predefined path that

9:27

may involve in retrieving information

9:29

from external tools. The key trait here

9:31

is that the human programs a path for LM

9:34

to follow. Level three, the AI agent

9:37

receives a goal and the LM performs

9:39

reasoning to determine how best to

9:41

achieve the goal, takes action using

9:44

tools to produce an interim result,

9:46

observes that interim result, and

9:48

decides whether iterations are required,

9:51

and produces a final output that

9:53

achieves the initial goal. The key trait

9:56

here is that the LLM is a decision maker

9:58

in the workflow. If you found this

10:00

helpful, you might want to learn how to

10:02

build a prompts database in Notion. See

10:04

you on the next video. In the

10:05

meantime, have a great one.

More transcripts

Explore other videos transcribed with YouTLDR.

Get the TLDR of any YouTube video

Transcribe, summarize, and repurpose videos in 125+ languages — free, no signup required.

Try YouTLDR Free