Depends on the streaming video provider used. Which could also be Vimeo instead of Youtube. The Youtubedl tool is obviously made to download from Youtube. May not work with other videosources

Downloadhelper, I used this since a few years. When you feel good by Downloadhelper I suggest you do a donation so we can use it for long time. BTW, I have nothing to do with DH but I am happy I can use it on daily base.

on facebook, you have to open them in their own tab/page. I just downloaded one a few minutes ago of my friend playing guitar.

If it's from youtube I just copy and paste the link in...

I use fdown in the browser... Works very well across devices.
(I'm not allowed to post the link, it has 'net' after the dot.)

Why not just "save" option ??

JDownloader still works

I use Xtream downlaod manager in linux.

I use web based sites like ytmp3

[SOLVED] Thanks everyone, I have found a solution. Just change www.facebook.com to m.facebook.com and yt-dlp can download videos.