>>14509500It's just a continuation of the gag from another clip, where Laplus saw people superchatting love letters to Chloe, and Laplus tells her chat "all you guys send me is random crap!", so the fan in this clip is trolling Laplus by sending her a love letter meant for Chloe. Cue Laplus comically going "oi!" and everyone laughing.
So now that I've explained the banter, which is one of the most basic components of human interaction, that might help OP deal with his social autism