Lua reads what you say
Each line is checked for the product, site or moment you talk about.
B-roll
B-roll from the real product, not stock footage.
Finding b-roll means hours of screen recording. When you talk about a tool, Lua finds its site or launch video, records the moment that matches your line, and puts it on your timeline.
LuaSaved
Chatting in the left panel
B-roll
Black behind b-roll
Adds a layer under your b-roll — turning it off removes that layer
00:00:26
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How to stop hallucination in your AI product?
idhu vandhu namma system promptla poyittu simple aa
hallucinate pannaadha hundred percent right result a kodu appadinnu sonnaa mattum patthaadhu.
ennaa adhu work aagaadhu.
ennaa AI sollum
boss naan right information thaan
unakku kudukkuren appadinnu
ennaa AI model vandhu thappaa
answer pandradhai vida enakkuth theriyalainnu sollattum.
adhai vachu namma adhukkappuram context improve panni
andhak case varaadha maadhiri thadutthukkalaam.
And ungalukku unga AI product-la hallucination stop pannanumnu ninaicheengannaa comment-la hallucination type pannunga.
adhukkaana step by step detailed doc naan direct aa ungalukku send pandren.
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The app’s own screen, rebuilt for the web with sample data. Click around.
How B-roll works
What Lua does
Lua reads each line, finds the product you mean, and records the shot.
It finds and records the shot
It searches the web and YouTube, then records the product’s site or official video at the right moment.
Keep it or swap it
The best shot goes on its own track. Up to 3 other options wait one click away.
The details
What you get
Hover or tap a card, then click around inside it.
Test reel
Tested on a real reel
On one test reel, Lua filled 15 of 16 b-roll spots for $0.15 of AI cost.
Spots filled15 / 16
AI cost$0.15
Line 4 · “open NotebookLM”notebooklm.google.com
PlacedLine 9 · “the new audio mode”Official launch video · 0:41
PlacedLine 12 · “my old routine”Nothing to record
EmptyYour b-roll
Your own clips too
Add your own b-roll on the upload screen. Lua places each clip where it matches what you say.
From your upload
screen-rec-02.movMatches “upload a PDF”
Placeddesk-shot.movMatches “my study setup”
PlacedTimeline
Real clips you can move
Every shot is a normal clip on its own track. Move it, trim it, swap it or delete it. Click one below.
Captions
B-roll
Takes
Click a clip to select it
Quiz screen3 other shots for this line
SwapAI chat
Ask for one shot
Want a different shot? Ask the AI chat. It finds options for that one moment and places the best one.
Find b-roll for “it makes you a quiz”
Found 3 shots on NotebookLM’s own site. I placed the best one at 0:18.
Quiz screennotebooklm.google.com · B-roll track
PlacedAsk for the shot you want
Not the shot you had in mind? Tell the AI chat. It finds b-roll for that moment and places it as a normal clip you can undo.
- Ask in plain words
- Lands on its own track
- One ⌘Z removes it
LuaSaved
Chatting in the left panel
Edit AI
At 1s
OpenAI
00:00:17
Nothing selected
CC
V1
A1
0s2s4s6s8s10s12s14s16s18s20s22s24s26s28s
How to stop hallucination in your AI product?
idhu vandhu namma system promptla poyittu simple aa
hallucinate pannaadha hundred percent right result a kodu appadinnu sonnaa mattum patthaadhu.
ennaa adhu work aagaadhu.
ennaa AI sollum
boss naan right information thaan
unakku kudukkuren appadinnu
ennaa AI model vandhu thappaa
answer pandradhai vida enakkuth theriyalainnu sollattum.
adhai vachu namma adhukkappuram context improve panni
andhak case varaadha maadhiri thadutthukkalaam.
And ungalukku unga AI product-la hallucination stop pannanumnu ninaicheengannaa comment-la hallucination type pannunga.
adhukkaana step by step detailed doc naan direct aa ungalukku send pandren.
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Keep going
Works well with
Captions
Timed to every word, in your language
Four styles from After Effects templates, in English, Tamil or Tanglish.
See Captions
BUILD YOUR AGENTCaption style
Editor + AI chat
A real timeline you can talk to
A real timeline you can talk to. Every change is one ⌘Z.
See Editor + AI chatMake the hook faster
Trimmed 0.8s of pauses from the first two clips.
Undo this turn⌘Z
Raw cut
Retakes and silences gone, every cut visible
Retakes and pauses cut. Every cut word stays visible.
See Raw cutTake 3
So NotebookLM can turn your notes into a quiz.
3 cut · click one to bring it back
Take 4Clean · kept
KeptQuestions about B-roll
Anything we have not covered? Send it over and we will answer.
No. Lua looks for the product’s own site and official videos — the launch video, the demo, the product page — and records the part that matches your line.
You record. Lua does the rest.
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We open Lua 50 creators at a time. Founding members keep today’s price for as long as they stay subscribed, and get 50% off the first month. Not for you? Full refund within 14 days of your first payment.