Watch Less. Know More.
Found an hour-long video with great info but no time to watch? Paste the URL into myCodex. In 2 minutes, you have a personal AI that knows everything in that video.
Free to start — no credit card required
YouTube Is Full of Knowledge. Finding It Shouldn't Take Hours.
You watch a 90-minute lecture and remember one thing. You scrub through 40 minutes of tutorial looking for the 30 seconds you need. You bookmark videos you'll never rewatch. Sound familiar?
Your Video, Searchable in Seconds
myCodex transcribes the video, indexes every word, and lets you ask questions — with answers that cite the exact moment.
Instant Summaries
Get the key points from any video in seconds. No more watching at 2x speed and hoping you catch everything.
Targeted Answers
Ask specific questions. Get specific answers. The AI only pulls from your video — no hallucinated facts from the internet.
Synced Video Player
Click any citation and the video jumps to that exact moment. Read the answer, then watch the source yourself.
Three Steps. That's It.
Paste a YouTube URL
Drop any YouTube link into myCodex. We transcribe the entire video with timestamps in seconds.
Ask Your Questions
"What were the 3 main arguments?" "Explain the part about neural networks." Ask anything.
Get Timestamped Answers
Every answer cites the exact moment in the video. Click to jump there and verify it yourself.
Rather watch on YouTube directly?
Get the Chrome extension and bring your Codex anywhere. Import videos as you watch them, chat with your sources in a side panel, and never leave the page. YouTube, documentation sites, research archives — your AI travels with you.
Stop Rewatching. Start Asking.
Paste a YouTube URL, ask 5 questions, and see how it works — completely free.
Try It Free