Sorry for not being a one-shot.
Okay lets take Vikk's 2 legged challenge video. He was partnered up with JJ right? I have 2 options :)
1) JJ and Vikk are dating so when they are partnered up and they lose, Vikk is sad and JJ decides to cheer him up. Fluff is preferred but maybe smut afterwards as well ;)
2) Simon or Josh (or both) are dating Vikk so when he gets partnered with JJ, who obviously has a crush on him, they get insanely jealous with little things happen (JJ carrying Vikk or hugging him and stuff like that).