Antivirus programs or firewalls sometimes flag the "segments" being downloaded as suspicious. They might quarantine the temporary files AVD creates before they can be assembled into a full video.
If you use a browser-based VPN, the AVD extension will try to use it, but the required Native Application (which does the heavy lifting) may use your standard internet connection. This mismatch causes the segment requests to fail or return empty.
To ensure the extension and the Native App are on the same page, and use a system-wide VPN instead. This ensures all download requests originate from the same IP address. 2. Whitelist AVD in Your Antivirus ant video downloader downloaded segment is empty
If you are on Firefox, "Hardware Acceleration" can sometimes cause glitches in how extensions interact with media streams: your add-on Ant Video Downloader does NOT work! Why?
Set the time range to and ensure Cookies and Cache are checked. Restart your browser and try the download again. 4. Update or Reinstall the Native Application This mismatch causes the segment requests to fail
Check the section in the AVD Settings Page to ensure both the extension and Native App are current.
AVD relies on a "Native App" to handle complex video assembly. If segments are empty, the link between the browser and this app might be broken: Core Reasons for Empty Segments
This guide breaks down why this happens and how to fix it so you can get back to your downloads. Core Reasons for Empty Segments