Privacy Policy
Last updated: November 2026
What Chammary does
Chammary is a web application and a Chrome extension that captures YouTube video transcripts, stores them, and lets you chat with the content of videos you've watched.
Data we collect
Account information
When you sign in with Google, we receive your email address and basic profile information (name, profile picture). This is used to identify your account and is stored in our database.
YouTube video data
When you visit a YouTube video page, Chammary automatically collects:
- Video metadata: title, description, duration, channel name, thumbnail
- Video transcripts and captions, including timestamps
This data is uploaded to our servers so you can chat with it later.
Chat messages
Messages you send in the Chammary side panel are sent to our backend for AI processing and stored in our database linked to your account.
User preferences
Your preferred transcript language is stored in our database.
YouTube subscriptions
If you choose to import or resync your YouTube subscriptions, Chammary asks Google for read-only access to your YouTube account (youtube.readonly) and uses it once, at that moment, to read the list of channels you subscribe to.
- We store only the IDs of those channels, linked to your account, so new videos from them can be summarised for you.
- We don't store the access token Google gives us, and we keep no ongoing access to your YouTube account.
- We don't read anything else from YouTube, and we never post, subscribe or change anything on your account.
- We don't sell or share this data, and we don't use it for advertising or to train AI models.
- You can unfollow any channel on the Followed channels page. Deleting your account removes your followed channels.
Chammary's use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements. You can also revoke Chammary's access at any time from your Google Account permissions.
Data stored locally
Chammary stores the following in your browser's local storage:
- Your authentication session tokens
- A queue of pending transcript uploads
- A list of video IDs already processed, to avoid duplicates
How we use your data
- To process and store video transcripts for retrieval
- To enable AI-powered chat about video content
- To summarise new videos from channels you follow
- To maintain your account and preferences
We do not sell your data to third parties. We do not use your data for advertising.
Third-party services
| Service | Purpose |
|---|---|
| Google OAuth | Sign-in |
| Supabase | Database and file storage |
| YouTube | Fetching transcripts and metadata |
| YouTube Data API | Reading your subscriptions when you import them |
Permissions
| Permission | Why |
|---|---|
| storage | Store your session and upload queue locally |
| sidePanel | Display the Chammary panel on YouTube |
| youtube.com | Read video metadata and capture transcripts |
Data retention
Your data is retained as long as your account is active. You can request deletion by asking a bot in a chat or contacting us directly.
Contact
For questions or data deletion requests, contact us at privacy@chammary.com