The “flowing” is because of the smoothing function performed by our consciousness.
we have roughly duplicated it using fourier transforms, allowing us to swap time and space or space and time.
this is used to its most brilliance in communication, particularly in music digitizing.
it’s an imperfect swap back-and-forth: something is always irretrievably lost when you swap space and time.
likewise, when our minds do their best to simplify the world around us, such as creating an illusion of simple flow (our internal biological clocks and anticipation mechanisms aid in our reality-sampling rates), our perception loses details.
But it has to be this way. Too much happens at at given sample to process it all.