This video's been doing the rounds on conferences for ages, it usually shows a gorilla and is clearer to see than this but the audience still never spots it.
The presenter normally produces the video to me in the mornings rehursals to play in the meeting and smugly asks me to count the number of passes thinking I've never seen it before, I normally ask them what is that roger great gorilla doing in the middle of all the players
Looks like one of TFL's marketing bods has been to that conference