Thanks to our friends over at Access Now, we've discovered this video, which was taken during the protests that erupted at the funeral of a dissident Iranian cleric, Ayatollah Montazeri.
Hundreds of thousands of Iranians gathered, and this video depicts the crowd from above. The pro-reform protesters are chanting in favor of the green movement, shouting "Ya Hossein Mir Hossein"!
onlymehdi, the user who posted this video, was the seventh most viewed channel on all of YouTube yesterday. onlymehdi aggregates videos from Iran on a single channel and has been doing this since June, when the contested presidential elections were held and the pro-reform "green" movement picked up steam.