If the evidence and the videos is a straight forward as it seems and not cut between parts or something like that, I personally believe you don't deserve such punishment as it shows that you didn't place the entities there or anything. But, aiding someone and trying to hide the truth is punishable in a minor way perhaps.
Even though, if this is what I think is true and correct, I give you a positive support on this one.
Good luck on your appeal!