I did, and enjoyed it as a good pop-sci outreach video, and do not fault it given that's what it is. The lim v->c analysis is standard and well-presented, but his conclusion about photons' time is liable to confuse people (including other physicists who aren't relativists). I refer you to my comment elsewhere in this thread <https://news.ycombinator.com/item?id=36537015> which has a paragraph about this video (your link having partially motivated my comment), and which explains that it is common for relativists to use affine time for massless particles.
