Which attribute do you need to control video playback on a webpage?

To control video playback on a webpage, the attribute that you need is "controls". This attribute is used within the <video> HTML tag, and when specified, it provides users with a default set of playback controls such as play, pause, volume adjustments, and fullscreen options. This allows users to interact directly with the video element and manage playback according to their preferences.

Using "controls" is a widely accepted standard in HTML5 for video elements, making it essential for creating user-friendly media experiences on websites. The other provided options do not align with the standard HTML5 specification for video elements, which is why "controls" is the correct choice for enabling video playback functionality on a webpage.