Today marks one year from the start of Egypt's revolution, a time marked by demonstrations, marches, and, in some cases, clashes between citizen's and police and other security forces.

To commemorate the occasion, many Egyptians gathered once again in Tahrir Square in large numbers. You can see some of the footage -- which, like many of the events of the initial revolution, was filmed by citizens and other bystanders -- at CitizenTube or in the playlist below:

(Use the arrows to navigate between videos or watch them all here.)