There is no single documented original video behind this clip, which is common for short slang shouts that circulate as reaction sounds. Dale wey is a Mexican Spanish expression used to urge someone on, and the elongated weeeey version turns that encouragement into a meme-ready hype call. It has spread through short gaming clips, reaction edits, and social videos where creators need a burst of energy before a bold move. Its appeal is simple: the phrase is easy to recognise, even for viewers who do not speak Spanish, and the stretched delivery makes it sound playful and over the top.