Today marks the 31st anniversary of the Iranian Revolution, and opposition leaders Mir Hossein Mousavi and Mehdi Karroubi have called for all pro-reform Iranians to join in a mass rally today in Tehran.
The videos have begun to stream into YouTube - a quick search for "22 Bahman Iran" on YouTube is already turning up 319 videos uploaded today.
Protesters appear to be facing off with the police in this clip:
Security forces can be seen standing by:
Pro-reform activitst stomp on a picture of Ayatollah Khomeini:
This video allegedly captures protesters chanting during President Ahmadinejad's speech:
Here's a playlist with some of the other videos that have come in:
Stay tuned for more updates.