This first clip, from Al Jazeera, shows protesters overcome by tear gas (at about 2:00 minutes):
And here's the scene from the Qasr al-Nil bridge near Tahrir Square in Cairo. Students push back riot police:
And from yesterday, dramatic footing of a man being shot during protests, and Vice President Biden's interview on PBS: "Protests Escalate in Egypt — U.S. Stands by in Realpolitik Mode."
More from Michelle Malkin, "Uprising in Egypt":
They’re calling it “Angry Friday.” Protesters in Egypt may have been cut off from the Internet, but information will always find a way to free itself. Egyptian President Hosni Mubarak is presiding over a violent crackdown against opponents who have joined a region-wide revolt against autocracy ...Also, at Wall Street Journal, "Egypt Deploys Military On Cairo's Streets" (via Memeorandum).
UPDATE: Some additional video: