Could you give more details on exactly what the protest is about? Why does the site say a protest against anti-chauvinist article?
The source seems to indicate that Tabriz is in Azerbaijan, not Iran. A Google search confirmed this.
This protest began before this march, in response to a cartoon in a newspaper that the Azeris took offense to. (there was a character in the cartoon who was depicted as a cockroach that spoke the azeri language/dialect and the Azeriss' didn't appreciate being depicted as a cockroach)
The title of this video is misleading, as this demonstration march is against the regime. Not just the cartoon. The cartoon was a catlyst for a bigger protest against the regime.