How would they do this for client-side applications? I made a desktop application that essentially streams & rips (to mp3) Youtube videos but doesn't show any o

How would they do this for client-side applications? I made a desktop application that essentially streams & rips (to mp3) Youtube videos but doesn't show any of the video data at all-- never had any issue with blocking or limits. To do so would mean blocking regular browser access too (since the app behaves like a browser, even to the level of requesting other page resources). I imagine it would be difficult to tell the difference using heuristics.