I am imagining a program like the Windows Snipping Tool but instead of making a jpeg, it creates a 'window' with a live view of just the highlighted area of that application's window. Sidebar: it would be good if this could be made 'always on top' as well.
Imagining a use case: Live Snip out a YouTube video and then go to another go to another tab and do work while watching the YouTube video. (I know there are Chrome extensions that can do a pop out for YouTube, but I would like to do this with other things as well)
If there is no software currently, is this programmable (hopefully in Python, because that's what I know best)?