Catch up with one hotkey
V1
Press the shortcut. The video pauses and one line catches you up to the current thread.
Lost focus, fell behind, can't follow?Press one key to catch up.
For videos, courses, livestreams, meetings, and podcasts. Press the hotkey when you drift, understand the current thread in a few seconds, then get back to watching.
One key→
Few seconds of context→
Back to the content
YouTube first. Courses and meetings shown as later flows.
Join Waitlist ↓
Harvard CS50 - Full Computer Science University Course
▶◕3:32:16 / 1:00:51:37
⌃V1
What it does
Built for the few seconds after you realize you are lost
Scales to what you missed
V1
Short context for a small miss. More context for a bigger gap. It adjusts to what you lost.
Ask without leaving
V1
Ask a grounded follow-up without opening a transcript or switching tools.
Let auto popup help
V1
Optional auto popup mode can surface quiet catch-up lines before you have to ask.
Explains it in simple language
V1
When you can't follow what's being said, get the idea in plain words right where you are.
Use it beyond YouTube
Later
Catch up inside Coursera, edX, Udemy, Zoom, Google Meet, and YouTube Live without rewinding or asking everyone to repeat.
Gets sharper with every session
Later
Adapts to what you expand, skip, and ask — language, depth, vocabulary. The catch-up that pops up starts to sound like the one you would have written.
Sounds familiar?
Built for students, professionals, language learners, ADHD, low attention, and anyone watching long-form tired.
- Keep losing the thread?
- Scrubbing back trying to find where it slipped?
- Found it, lost it again two minutes later?
- Watching the same minute on loop?
- Every long video, same pattern?
- Joined the meeting ten minutes late and pretending to follow?
- Watching tired, eyes open, brain elsewhere?
- Paused for lunch and the speaker's three points ahead?
- Got distracted, came back, lost?
- Missed one word and the whole sentence is gone?
- Caught up to that sentence, missed the next two?
- Speaker hits an idiom you don't know and you fall behind?
- Can't understand the concept, even after replaying it?
- Focused on understanding and missed what came next?
One key. You're back in.
More than rewind
One catch-up layer, multiple recovery modes
Real video mess
Readable over bright slides, dark code, and busy scenes
Theme
Bright slides
He explains why new evidence can still be misleading when the prior is tiny. ↶ 11:42
Dark video
He explains why new evidence can still be misleading when the prior is tiny. ↶ 11:42
Mid-warm interior
He explains why new evidence can still be misleading when the prior is tiny. ↶ 11:42
1 const posterior = (prior, evidence) =>
2 update(prior, evidence);
Code screencast
He explains why new evidence can still be misleading when the prior is tiny. ↶ 11:42
Outdoor sunny
He explains why new evidence can still be misleading when the prior is tiny. ↶ 11:42
Animated explainer
He explains why new evidence can still be misleading when the prior is tiny. ↶ 11:42
States and priority
Quiet when you ask. Louder when the system speaks first.
Priority levels
He is moving from intuition into the theorem; this is the bridge that makes the math readable. ↶ 19:47
Low · default
He is moving from intuition into the theorem; this is the bridge that makes the math readable. ↶ 19:47
Medium · left stripe
He is moving from intuition into the theorem; this is the bridge that makes the math readable. ↶ 19:47
High · L-corner
All states
Indicator states
Small until the user asks or the system notices drift.
Indicator idle
Indicator loading
Indicator pill
Popup states
Quick answer first, then expandable context when needed.
Popup basic
Popup expanded
Popup Q&A
Recovery history
A longer trail for meetings or sessions with repeated catch-ups.
Chat panel
FAQ
Before you ask
How is it different from AI summarizers?
Summarizers and "ask the video" tools answer about the whole video. This catches you up to the exact moment you're at, in a line or two, then you keep watching.
Will it interrupt me while I watch?
It does nothing until you press the key. Auto-popup is optional, and off whenever you want.
Feedback
Help decide which context matters most
Tell me where this would actually save you: YouTube, courses, livestreams, meetings, podcasts, or something else.
Catch up to anything spoken. In one key. From now on.