Which feature must you access to set the fade-in timing of a video in PowerPoint?

To set the fade-in timing of a video in PowerPoint, the Playback Ribbon Tab is the feature you need to access. This tab is specifically designed for managing video and audio elements in your presentation, allowing you to control playback settings such as start, volume, and fade options.

The Playback Tab provides options that directly pertain to media, enabling you to adjust how and when the video starts playing and transitions in the presentation. Fade-in timing is related to how the video enters the slideshow, which falls under the media playback options, making the Playback Tab the appropriate choice.

The other ribbon tabs serve different purposes; for example, the Insert Ribbon Tab primarily deals with inserting new elements like images, charts, or media files, while the Design Ribbon Tab focuses on overall presentation design and themes. Meanwhile, the Animations Ribbon Tab is used for object animations within slides, which does not apply to timing settings specific to video playback.