From twitter and reddit, the general gist of it seems to be a response to Laporta calling Madrid Franco's club.
Real Madrid remind Barcelona he paid for their stadium to be built, saved them from bankruptcy 3 times, they won 8 league titles and 9 cups under him, they made him an honorary member, gave him medals and didn't retract any honours until 40 years after he died.
Meanwhile Real went 15 years without a title, had 15 players arrested and a president shot.
Apparently the video " also ends with a sound bite of Santiago Bernabéu saying when I hear that someone says that Madrid is the regime team I get pissed off and would like to beat the shit of whoever says that."
So things are getting pretty spicy and unprofessional in Spain!