Video Downloader Extension Corrupt

Went to use the video downloader but the green download button wasn’t there. The extension is installed but a message indicated that it was corrupt. Tried the repair button but nothing happened. Removed and reinstalled the browser but no video downloader extension. Where can I find the downloadable extension?

https://addons.avast.com/extension/kdhipfbocahipinepiahppeionfbahlg

Thanks

You’re welcome.

click Extensions icon, look for Video Downloader and pin it to Menu