Hi
I know there was already thread in this topic (/uploads/default/original/3X/9/7/97853dd04d22adca2b226cf3c0d3768b32a9d2a0.blendd=1319012096) and it is marked as Solved, but I am not really happy about it, and I tried to develop my own (based on original video tutorial)
controled_video.blend (482 KB)
I admit that for me everything is exploration in blender and maybe I have just used wrong logic, because at first animation sops and wait until “c” is pressed (at 20 frames) but after next stop (frame 65) it continues only if I hold “c” - and that what I wanted to prevent
sorry for bothering you with this topic again, and thanks in forward for help 
(I have also tried to do it with python controlling camera by applyMovement and recalculating movement vectors but rendering was unbelievably slow and bit inaccurate)