There are some functions that have to run on the main thread, so that might be the case here.
I don't know if it's possible to run the video player on the other thread?
I haven't used ofthread, so I'm just throwing ideas about here.
It might be worth (if you haven't done this already) putting in some cout<< messages in ofxtwitter &/or ofxOauth to see how far it gets until it freezes.
Also what might be happening which is causing the pause is that ofxOAuth is authorising every tweet, rather than once when the app starts.
Allllso what's it like sending an empty tweet rather than one with (I assume a screencap) data
Hth
