First off those conditions are not good to ride any park in ( I was being a bit sarcastic ) but if you do need to ride trails that are soft and wet then slow down and ride thru the center of the trail. When the puddles are avoided by going wide it starts to defeat the whole "single track" thing.
There is a lot of people that put a lot of hours into the trails and when we see this it does tend to upset some of them.
I think the dude that made the video did this one very early and has since found out that riding trails that are soft and wet is not good....
Oh if you were being sarcastic as well then you got me