This video is two years old, how did I not find this sooner!? I mean really, I check youtube every now and then because not everybody posts here to let me know, I kinda just stumble across it. It's a shame :(
Anyways, it's a fun playthrough from a Australian youtuber who has his little brother? I think playing Left 4 Dead in the background which tickled me.

Thank you darkgladiatorgaming! I wish I found it sooner...

(I also found a UK Let's Try of Infection but can't seem to find it anymore otherwise I would post that too. It pays to search your own game every once in awhile!)