OT: sensation of time phenomena

Have any of you noticed this curious phenomena? It has become especially noticeable now in this new digital world. I can watch a small video and then immediately watch it again. It is amazing to me how, if after seeing a video for the first time, if I then watch it again, the amount of time the thing lasts seems to be cut in half. The time just rushes by the 2nd time I watch it. [I am noticing this because I am getting into watching these old "One Step Beyond" episodes on YouTube, most of which I haven't seen before (they are really pretty good!).] I wonder if anyone has studied this phenomena. I think it is related to something else I noticed. Do you remember how when you were little, the summer vacation between school seemed to last SO long. But now that I am older, time just seems to fly by. I think it all has to do with the fact that, new things you have never experienced before, are not happening very often any more. I think if I were to experience as many new things now as I was experiencing when I was much younger, then time wouldn't seem to fly by the way it does now.