I think they poke around and post stuff that they like or think is funny etc.
They posted one of my videos once. They give their opinion of what they saw etc.
I guess they are like Buzzfeed and another zillion sites that do the same thing.
I don't look at those sites. I did look once I saw one of my old videos going off because I found it was them that created the traffic.
It's here
http://unofficialnetworks.com/2015/09/video-the-dos-and-donts-of-park-skiing
This is what they said about it
"
Looks like this guy got his money’s worth on his lift ticket by setting up shop off to the side of jump and filming everyone that went for it. While I appreciate the footage, I am worried this may become a fad for GoPro dads across the country. Lets hope not."