Bad news. There is always a telegraph. The key is learning how to use the correct part of the eye to see it (cones vs rods). Our eyes have a remarkable ability to detect motion as slight as body shift and weight redistribution. How good is it? If you get it right you can see a strike before your opponent decides to use it. The difficulty that we have is that our eyes like to focus on things and that interrupts our ability to see things. We often experience this heighten ability to detect motion when we say things like "saw it from the corner of my eye." The most common example I can think of is when a ball or object is thrown and a person sees it just in time to duck or avoid it without thinking.
Here's an example of that ability to track motion
I forgot the name of the Japanese Swordman who stated "focus by not focusing" or something like that. When you are able to do this at will, then it will be like everything is slowing down and moving in slow motion. You see the motion that comes before the motion. I've only been able to do this once during sparring.
I used to train this ability by not looking directly at my opponent. I look either to the right or left on my opponent far enough to where I can no longer see detail in my opponent. Your opponent should be like a blur. Keep doing this until it becomes easy to see the movement. Once you "master" this then move your gaze a little closer to your opponent. Eventually you'll get to point where you almost look directly at your opponent without focusing in on your opponent.
Give it a try and you'll be able to even detect motion that was described in the OP's video. Have fun with it and be patient. Focusing by not focusing is difficult to do, but when you get it, you'll be amazed.