I wrote a user script that does that!
Available on my GitHub, on Greasy Fork and OpenUserJS, under the MIT license.
What it does
It checks if it's on a video page (URL contains /videos/) and if so:
It checks every half a second if the popup appeared, and if so - removes it.
It also cancels the next video from playing automatically.
The code snippet
With the browser extension: uBlock Origin (Chrome version / Firefox version), AdBlock Plus, or a similar content-blocking browser extension that can use AdBlock Plus syntax filter lists, you can add the following custom filter:
That should block the "up-next" video autoplay and pop-up.
After searching the web for few hours, apparently there is no current way to disable that feature.
There are some question threads on Facebook's help community that are a few months old, as like the one in the link and none of them got answered by Facebook yet.
How can I turn off the "up next" video feature?
Was having the same issue with Facebook, with inappropriate videos showing up on the right side of the screen, during my 4 year old's remote learning sessions when watching educational videos shared by teachers. So I came up with this fix which works for me.
To remove/block the UP/NEXT video section, do the following:
Install Chrome extension “AdBlock” if ...
I had been using arieljannai's solution for a while until it didn't work anymore. I've cooked up a shorter tampermonkey script based off his. This currently works for me.
// @name Facebook UP NEXT Video killer
// @namespace http://tampermonkey.net/
// @version 0.1
// @description try to take over the world!
// @author ...
I don't think this is a new feature unless I'm missing an announcement somewhere.
You can just use https://www.facebook.com/search/USERIDHERE/videos-uploaded
or in search phrase format "Videos uploaded by NameofUser"
"Videos uploaded by Mark Zuckerberg"