I found it functional enough unregistered. The limit of max 5 simultaneous downloads is not a restriction as if you try and download a playlist from youtube it spots you are likely using a downloader and starts challenging you to log in to prove you are a human and not an automated downloader… It’s nothing special, no USP it’s just a GUI on top of yt-dlp and uses a pirated copy of FFMPEG to merge the video and sound files … yet another downloader that allows you to steal content and deny the services ad revenue.