As plain English descriptions go, I think it's satisfactory. If you know enough to know what's really going on, the video still has plenty of information to describe what they are really doing. I rather suspect they already know that.

Also, photons don't "move" in their own reference frame, in which the entire universe is a zero-dimensional point with no time; for everybody who has mass, they are moving. At the risk of being mass-o-centric, I think it's not that wrong to speak of their "motion". Some of my best friends have mass.