Dekiru is simply the Japanese word for can do it, and as a standalone clip it circulates online mainly as a short reaction sound rather than as a quoted line from a named show. Its appeal comes from its brevity and clarity: even listeners who do not speak Japanese can hear the confident tone and guess the meaning from context. Anime editors, meme creators and streamers reuse it because a single word can signal determination, encouragement or a sudden decision without needing subtitles or explanation, which keeps it useful across many different videos.