@kwpsp
Should work with both lite-C & C-Script.
I´ve tested now, but you need A7.73 Commercial version, maybe just update to it the new 7.73 version
http://manual.conitec.net/video_alpha.htm

@Quadraxas
video_screen = 0; don´t work with C-Script, only lite-C
0 - Don't open a video device A7.08 LC
http://www.conitec.net/beta/avideo_screen.htm
and -nwnd commandline paramater work only with Pro.
http://www.conitec.net/beta/a-black.htm