Is there there a way to download media from any android app

I'm not talking about popular applications like Youtube, Facebook or Instagram... Let's say there's an android app called 'bla' and there are videos in it just like youtube and not showing the url... What I'm asking is... Is there any way to download these videos directly from the app(using an xposed module or wtever..) or to find the urls of the videos(so I can download them from pc)... Any help would be appreciated..