FBTake's answer:
YeetDL - Convert and Download videos from YouTube for FREE. Full HD, 4K and 8K available, as well as MP3 and MP4 Formats! Try it now and Have fun!
FDOWN.net - Download Facebook videos and save them without using Java or installing software.
YTD Downloader - YTD Downloader is a free web-based downloader and converter that allow you to download videos and audio for later watch quickly.
SnapSave - SnapSave allows you to download your favorite Facebook Videos in HD qualities, including 1080p, 2K, and 4k on any device.
iTubeGo - iTubeGo YouTube Downloader for Android is an free mobile app will let you download YouTube, Facebook, Twitch, Bilibili videos on Android mobile phone. This great Android app can convert YouTube to mp3, mp4.
Download Facebook videos - Free tool to save videos and photos from Facebook.