Early access · Public YouTube sources
See what matters inside
long-form video.
Paste a public YouTube link. EchoLens returns the argument, the claims it rests on, and the moments worth watching — each one a click into the source.
One fresh analysis every 24 hours · sources up to 60 minutes · a Lens that already exists is always free to open. No account needed.
Explore example Lenses
See all 5 →Long-form sources worth the structure. Open one instantly — a Lens that already exists costs nothing to read.
AI & TechnologyLex Fridman2 hr 28 min
Demis Hassabis: Future of AI, Simulating Reality, Physics and Video Games | Lex Fridman Podcast #475
Natural physical and biological systems possess underlying low-dimensional mathematical structure shaped by evolutionary and physical selection, making them tractable to model and predict using classical neural network architectures and search algorithms without requiring quantum computation.
Open the Lens →7 moments
EconomicsMercatus Center58 min
Joseph Stiglitz on Pioneering Economic Theories, Policy Challenges, & His Intellectual Legacy | CWT
Joseph Stiglitz argues that standard neoclassical market models fail because real economies are defined by imperfect information, externalities, and incomplete markets, necessitating public institutions, strategic industrial policy, and market regulation to align private incentives with social welfare.
Open the Lens →5 moments
EconomicsTED17 min
The dirty secret of capitalism -- and a new way forward | Nick Hanauer
Neoliberal economic theory relies on flawed assumptions about human nature and market mechanics that justify inequality; sustained economic prosperity actually stems from broad social inclusion, cooperation, and deliberate public policy choices.
Open the Lens →7 moments
What a Lens gives you
- 01
The argument, first
One statement of what the source is actually arguing — before any summary, so you know within seconds whether it is worth your time.
- 02
The load-bearing claims
Five to seven moments that carry the argument, each attributed to a speaker, typed, and pinned to the second it was said.
- 03
The essential viewing path
The smallest sequence of moments that preserves the argument. A two-hour source usually collapses to fifteen minutes.
- 04
Every timestamp is a click
Nothing sends you hunting through a scrubber. Every moment on the page seeks the player beside it.
What EchoLens will not do
It does not tell you a speaker is right. A model can accurately capture what someone said without establishing that it is true, so claims are labelled as claims — recorded from the source, marked as unverified, and always linked back to the moment they were spoken so you can judge for yourself.
Also, deliberately not yet
No transcripts, no downloads, no accounts, no cross-video search. V0.1 does one thing: turn a single public video into a Lens worth reading.