I actually liked this a lot! Of course the animation could have been a lot better, like big name people on here, but overall I felt it fit a certain style, and the animation was smooth, fluid, and easy on the eyes, but the characters looked very natural and the animation still lent itself to very exaggerated actions. I also like the art style. I dunno, but I felt it kinda fit the overall style of the animation.
I laughed too! Funny little story there haha.
As for what's happening, overall I could tell what was happening. Guy with jeans needs to pee, but can't get his jeans off, so, in desperation, asks the guy peeing next to him for help. He hesitates...but in pity, and to calm him down, he decides to help. He has trouble, and during this action, someone steps in on them. He walks back out...seeing something very strange...and in anger, the guy trying to help him punches him for making him look bad. At the end he offers him a way to get off his jeans and (presumably) an unsoiled pair of shorts.
I wasn't completely sure what was happening near the middle though. Were his hands stuck in his pockets? I couldn't tell completely. And, one last tiny thing, it wasn't completely established why he couldn't get his jeans undone. I think it's just supposed to be inferred by the viewer that the button was stuck or something, but I'm not sure.
But yeah! I liked this! And I thought the music was a nice choice too haha.