If I'm reading the code right, those are captions for some videos that will be put up on the site. So if you're at Spoiler Level Beta* (only looking at official materials) you're probably ok to highlight it.
Oozer's Trademark Pending Spoiler Levels:
Alpha: The Man Who Knows Nothing. Won't look at anything, even officially released. Curses urk's verbosity and silently wishes the Weekly Updates to be nothing more than Blame Stosh.
Beta: Close your eyes Marion! Will watch and read anything officially released, but treats spoiler text like the Ark of the Covenant.
Gamma: I didn't make the Brinks truck crash, but I couldn't just let the bundles of cash sit on the road. Won't actively seek out spoilers, but if they happen upon them, they won't fight the urge to peruse.
Delta: I can quit any time I want! Has worn out his Google searching for spoilers. Has fought the urge to visit the seedier parts of the internet for a fix.
Epsilon: We kidnap and ravage and don't give a hoot, drink up me hearties yo ho! Actively searches for torrents. Will probably be banned from B.net for a flippant "Oh yeah, the Master Chief dies" type comment. Has multiple x's in Gamertag has debated moving to France.