Echoly — Live YouTube Translation

About

Echoly turns any YouTube video into a live dub in the language you understand best. Click the icon, pick a voice and a target language, press Start. The translated voice plays back over the video with sub-second lag in Realtime mode, ~5 seconds in Standard mode.

Why Echoly is different
• No account, no signup. You bring a Kyma API key (kymaapi.com) and the extension runs on your own balance.
• Two tiers — pick what fits the moment.
   - Realtime · sub-second lag · clones the speaker's voice or picks from 9 OpenAI voices · ~$0.46 per 10 minutes.
   - Standard · ~5s lag · 5 curated MiniMax voices, all multilingual · ~$0.25 per 10 minutes.
• 13 target languages: English, Vietnamese, Japanese, Korean, Chinese, French, Spanish, German, Portuguese, Hindi, Indonesian, Italian, Russian.
• Live source captions side-by-side with the dub if you want to follow along.
• Translation history — last 16 turns, scrollable.
• Independent volume control for the original audio and the dub.
• In-page panel you can drag, resize, hide.
• Pause/play the YouTube video and the dub follows instantly. No reconnect.
• 60-minute hard auto-stop with a 5-minute warning so you don't accidentally leave it running.
• Sessions end cleanly when you close the tab.

What it's good for
• Watching keynotes, talks, and product launches in your native language without waiting for human subs.
• Following long-form interviews, podcasts, and lectures faster than reading captions.
• Practicing a language by listening to native English content with a parallel dub.

How it works
Standard tier sends short audio chunks to Kyma, which routes through Whisper for transcription, Gemini for translation, and MiniMax for the voice. Realtime tier opens a peer-to-peer WebRTC connection to OpenAI Realtime via a Kyma-minted ephemeral token — your audio never round-trips through any other server.

What it doesn't do
• No account creation. No telemetry. No analytics. No data stored on Echoly's side — see our privacy policy.
• Not a download tool. Echoly does not save audio, transcripts, or videos to your disk.

Get a Kyma key at kymaapi.com. Free starter credit on signup; pay-as-you-go after that.