First, let's get something clear: I eat meat and I don't care that things made out of meat are killed so I can eat them.
So, you implied the video is skewed because they're only showing animals being mistreated. (I'm assuming here the video shows animals being mistreated. I'm sure someone will let me know if that assumption is incorrect.) If, however, the video showed animals being treated humanely, how would that in any way minimize the instances of the animals being mistreated? Just because there are instances of something "good" happening doesn't change the fact of something "bad" happening. Again, I get that apparently it's a propagandist video - but still it's showing something undesirable occurring.
By now you should realize that pedophilia - while certainly fairly far removed from animal abuse - is still a fine example of pointing out your error in reasoning. In fact, let's do this - we'll take what you said and just exchange "kids" for animals:
"It's a one sided video about kids who are pampered and groomed for pedophiles...of course they're only going to show the violent and abusive stuff they do to the kids."
See how it doesn't matter what it is that we're talking about? Saying it the way you did sounds a little silly - as though it's irrelevant that the video is showing undesirable things because it's made to make things look undesirable. Undesirability is undesirable, regardless, right?