The Huffington Post makes it look like the politician was caught off guard and didn't know how to respond to the $550 million being cut from the education budget, so he just left.
The problem is that supposedly the video was edited from the student's actual video to shine a bad light on the politician.
Supposedly the student was mistaken about the budget cuts. Something weird & confusing, like money was cut from the budget, but even more was put back in via other methods.
Supposedly the politician returned with more information and the whole thing was quite amicable and friendly.
Supposedly even the student is angry that his video was manipulated to spread this false information.
Supposedly the person responsible (perhaps indirectly) for the edited video is this politician's opponent, who lost to him during the previous election.
As Paul Keith said, there's not really much way of knowing which parts of the story are true without more information.
It's a pretty sad time when even the "video or it didn't happen" doesn't mean it really happened.