The first video shows people in Tehran, unified in the streets:
The second video shows security forces en masse clearing people out, and breaking up the impromptu rallies:
Al Jazeera/English gives a history lesson on why the protests may have happened on today's date.
I wonder what the protests will look like in 2019, should Khameini manage to retain control? Hopefully, they will be more like the Independence Day parades we have in the US on July 4th, and they will be celebrations.