I think the cameras are Burke's work, and Rusty's laptop must have a Backdoor that gives Burke access, that's how he got access to the video of the MC fucking Jade, and the DIK's Rooster account.
Given who Rusty's family is, it's not impossible that Burke would want to have something to use against them, or maybe even offer help when a Burgmeister needs it, so he can get favors in return, apparently Cathy has some connection with the Burgmeisters, might be that she has received favors from them and he wants the same.
In the Cathy episode, we saw that someone spread Cathy's pictures all over the campus, it's impossible for Burke not to know who did it, there must be many cameras on campus, he knows who did it, but he doesn't care, it might even help in his plan to get rid of Cathy.
(And then there's that episode at the beginning where Dawe throws a can in Cathy's face, in front of everyone and nothing happens to him...)
Burke offers tuition to certain students, so we know that there are students who would follow his "orders" to help with his plans, but he is behind all of this.
Anyway, he's an antagonist, isn't he?