How To Record A Video From a Firefox Page?

[arthur brogard]

I've seen the instructions but I can't follow them. Somehow I always get confused, lost and don't get there.
Because I am trying to record a video on firefox web page I reckon I need a new 'display' source but I need to isolate the required area within it.
I cannot fullscreen the video. I can't do anything with it directly. Just run it.
But I can't find how to set up this new display source that is just the video.
Can anyone help?

 

[Kraezy]

Can't necessarily isolate the video within the webpage directly, you can crop the area though.

Make sure the Display Capture Source is not locked in the Source list.
Select it in the preview and hold ALT whilst dragging the sides.
Crop the Display Capture source to fix around the video of your choice.

 

[arthur brogard]

thanks but sorry, I couldn't follow the instructions. I couldn't find how to crop.
found other instructions whereby I mess with filters but that didn't work either.
:(

 

[hsmptg]

Hi
The easiest method is to use the picture-in-picture possibility of most modern browsers that put the video on another window and then in OBS we can capture just that particular window.
Firefox even allow have multiple picture-in-picture windows, but unlike OBS in Linux, in Windows I can not capture those different windows since it always choose one of them. I wonder if there is a way to fix this.
Regards

 

[arthur brogard]

That's interesting. But I think not something I can use. This firefox page with a video that I"m talking about is put out by an online school and I don't think I can have any control over the video at all. It's just there and that's it.