It runs on Mac OS X 10.7 or above, and macOS Big Sur is fully supported.
Though it supports most famous websites, it can only download videos from YouTube, Vimeo, TikTok, SoundCloud, Flickr, Facebook, Instagram, DailyMotion, Likee, Tumblr and Twitch.Able to download a single YouTube video, as well as YouTube playlists and channels.