The sound comes from Mellstroy, a Russian-speaking streamer whose short, expressive reactions are widely shared as clips across Russian-language streaming and meme communities. Spasibo khorosho, literally thank you, good, works on its own because the phrase is simple, friendly and easy to recognise even for listeners who only know a few Russian words. As short-form video and soundboard culture grew, brief streamer catchphrases like this became reusable reactions, and this one has stayed in use as a quick way to signal gratitude, irony or playful politeness.