The video is routinely at at
http://www.telrumeidaproject.org/video.html, second video on the page (currently) and the summary is:
'In May 2005, a group of teenage settler girls attacked the students and teachers at Qurtaba School, blocking their way out of the school as a police officer filmed and soldiers watched. The settlers sing and chant in Hebrew, "There is no Palestine, this is Israel" and "there are no Palestinians." Settler boys in the street then blocked the stairs by stoning the students as they tried to come down the stairs. The students scream and run, but are blocked from every direction. The police and soldiers do not protect the students.'
I think I'd say that the police and soldiers tried to keep the peace, and in once case even thwacked a boy about to throw a rock. In another instance, security broke up an incipient tussle when a Palestinian woman lunged at an offensive girl. The mutual hostility is palpable. The security folk may be sympathetic to the settlers--it's actually hard to tell, viewed other than through the lens of solidarity with the Palestinians. But security certainly knew something was going to happen; as did the ISM folk. Whether their presence altered the dynamics I can't know.
But this is Hebron. "Tel Rumeida" masks a thousand years of hateful, intolerant history. The settlers there are the most extreme, and the entire issue is the Mosque of Abraham/Cave of the Patriarchs. That's where Baruch Goldstein from nearby Kiryat Arba killed some Palestinians in a massacre. It's where Jews weren't allowed to pray when it was under Muslim rule, relegated to the steps. Even now they're barely allowed in.
These folk are not usually illegal settlers (in the sense "people who illegally settle", not the offensive "illegal people who settle"); they're very careful to not be illegal settlers. They buy where they live or otherwise have some legal hook. They're simply repulsively hostile to Arabs. Meanwhile, they're also frequently prevented (mostly by the Israeli government) from living where they own property/land because the response from the Palestinians would disrupt the peace.
They consider themselves something like "the resistance".
Isn't intolerance just grand?