You might encounter some limitations while working with Vault for Google Drive. The following actions aren't supported:
- Searching and previewing contents of non-indexed files such as ZIP files, audio/visual files, or other container files
- Searching contents of large files, as only the first 1MB of content is indexed within Drive (for example Excel, PowerPoint, and PDF files
- Previewing video files
- Searching videos automatically synced from a user's Currents (formerly Google+) account
- Searching, previewing, and exporting email layouts
We'll update this page as new fixes and features are released.