The clip points to Call of Duty: Black Ops 2, the 2012 Treyarch shooter that became a huge part of montage and trash-talk culture online. Phrases like "clapping cheeks" spread through gaming communities as a joking way to describe total domination in a match. Sounds labeled this way are commonly reused in short edits, lobby memes and reaction posts because BO2 still carries a strong nostalgia factor for multiplayer fans. Even brief audio tied to that era gets shared as an inside joke among COD players.