def render_block(self, context, backend):
context.push()<EOL>context[self.variable_name] = backend<EOL>output = self.nodelist_file.render(context)<EOL>context.pop()<EOL>return output<EOL>
:param context: Django template RequestContext
:type context: django.template.RequestContext
:param backend: Given instance inherited from VideoBackend
:type backend: VideoBackend
:rtype: django.utils.safestring.SafeText