This video is called Yemen Frees Female Activist After Protests.
From the BBC:
9 March 2011 Last updated at 07:48 GMT Help
The Yemeni protesters, mostly students, have been camped out in front of the university since mid-February
They [security forces] were trying to stop thousands of people joining a protest camp at the university calling for President Ali Abdullah Saleh to resign.
Women’s take on uprisings in the Middle East: here.
Nerve gas used against protesters in Yemen? Here.