Funny, but not real. Believe it or not, I've actually ran two segments of 2004 Athens Summer Olympics torch relay. It's nothing like that video...there are support runners all around you, vehicles front and back (to include a media truck full of cameras that drives in front of the torch bearer) and guys on motorcycles cutting through the route ensuring each relay goes as planned. There is also a back-up in case a runner's torch gets extinguished. It happens on occasion, but the torch is simply re-lit and goes on.
Samsung was the primary sponsor of the relay that year, and was kind enough to let us keep our torches (which cost about €300 apiece, if I remember correctly).
Cheers! M2