This project is dead. If the addon doesnt work for you do this instead:

Get ffmpeg
Get stream detector or hls downloader

Copy the link from one if those addons and download them with ffmpeg. This solution even works on encrypted/paid service downloads.

you can also use yt-dlp which works on many websites, but not paid stuff. I dont think.

Addons like this are probably doomed in the future because of Google's control on the web.