Flash Video Downloader might be a bit more popular than SnapTube. We know about 1 link to it since March 2021 and only 1 link to SnapTube. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Btw if you're on Android and don't have YT+ you can use Snaptube to download http://snaptubeapp.com/. Source: about 2 years ago
Or, maybe you're talking about this one https://web.archive.org/web/20180511014655/https://addons.opera.com/en/extensions/details/getthemall-any-file-downloader/ that was made by https://everhelper.me/. (Clicking the "add to Opera" link doesn't work unfortunately because the downloaded link itself was never archived). Source: almost 3 years ago
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
Video DownloadHelper - Browser extension to download videos from the Web
NewPipe - NewPipe is a lightweight YouTube front-end for Android.
FastestTube - Youtube fastesttube downloader will make your internet expirience faster harder beter stronger.How to merge video and audio .
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
ClipGrab - A friendly downloader for YouTube and other sites