Since
4:2:2 is NOT a signal, but a method to encode color in compressed video, the signal reception is no different from any other signal broadcast with the same sat transmission standard. The signal is tuned and demodulated by the STB tuner & demod, but the resulting video stream can't be decoded properly, since the next in processing pipeline decoder chip doesn't support 4:2:2 decoding. If the box firmware allows to stream the TS over LAN, it can be decoded on a PC via VLC player. Another method frequently used in PC Media Centers like Windows Media Center is to keep recording streamed by a tuner video & audio mux and immediately playing it back (that allows Timeshifting). Existing OpenBox FW allows to record the TS via USB to a hard drive in a .ts like format. It might be interesting to request from manufacturer, if they can fix the FW to stream the TS via LAN instead of sending it via USB port. I don't have OpenBox in the moment, though would be interested to try one. It might already be possible now.
In this capacity the STB would play a role of a PC Sat Tuner. Obviously, instead of a PC a standalone network media player can be used that supports 4:2:2 video decoding - you just hook it to a TV via HDMI cable.
Anyone tried to stream a non-decoded TS over LAN with AZBox? If it can do that, similar FW feature can possibly be added to OpenBox. The decoder chipset in OpenBox can NOT properly decode 4:2:2, it has insufficient processing power for that and no suitable codec.