In the past, this has been a useful and dynamic add-on. It has now been monetized (watermark/stamp on downloaded videos) and requires installation of an external application that is not the git-hub secured version. The "companion app" is basically just FFMPEG, which many have installed by official sources but this official one is not recognized by the add-on. This leads to unnecessary and risky additional apps. Sadly, there are no brave alternatives for websites besides YouTube, Vimeo, etc.