IRIB is airing supposed footage from Ahmadi's rally in Azadi Square. Pedestrian has more:

Azadi is FILLED TIGHT. But the images are not live. (they claim it is this years). Lots of people are carrying green flags. But you can also make out people with green ribbon in their hand. IRIB will not air the sound from the square but has its own tune playing … which means something is going on there that they do not want us to hear! Here is a video of the night before, showing how Azadi Square has been sealed off with wire.

Josh Shahryar adds:

Apparently the government-run media in Iran is showing doctored from previous public gatherings in order to block out green protesters from the TV screen. Here’s a purported video from IRIB.

The BBC is also featuring some footage.