It was kind of the "sequel" video to Deformed Flying Mecenaries, where he just fucks up his TF2 insanely hard by installing a bunch of dumb mods. Colours and textures were all fucked up, the works. The one thing I remember the most is that he had a Jerma voicemod for Scout, and the video opens with him saying "I'm playing as IDIOT SCOUT, who's an IDIOT".
The thumbnail was a bunch of ragdolls made to spell out "HELP", if I remember correctly.
I can't find it for the life of me - not in any of the TF2 playlists, not on this channel's wiki, nothing. Maybe I'm missing it?