When we define meditation as being with what is, what we mean is that we try to cultivate our ability to be present with what is happening. This exercise invites you to focus your attention on the video and to stay with the experience. It is quite possible that some part of you may start narrating what is happening or commenting on what you see. In either case just return to noticing what you are seeing. If your mind starts going into other times and places by remembering or planning, just keep returning to the video without judgement. Notice whatever happens and consider welcoming whatever is unfolding.
Be curious to notice what happens if you try this exercise every day for one week or longer.