No one's trying to hide the fact that the title of this episode is, to put it gently, extremely poorly conceived. It plays on the idea that you can just slot numbers in for letters, like the absolutely hilarious "5NAL DESTINATION". Actually, this makes less sense, because saying it out loud you hear "four-riendterrogation".
The Scooby Dudes have fun with song lyrics! They hear from a whole bunch of people from a particular social media network (hint: it's not Facebook!). They forego one fancast and tackle another! Basically they answer a bunch of questions and also make jokes; you know the drill.