Same problem here, since 6.0.6 ‘Video service not responsive’ happens every day. We are running 6.0.6 on 2 different systems, one with a Decklink card (Mac Pro) and one on the internal videocard (Mac Book Pro) and it happens on both systems.
Very frustrating, because restarting N6 when recording to picture with actors and clients in the studio is not something I like to do (every day)……
Please Steinberg, solve this problem in N6.0.7!!!
Alan