Which tool is primarily used to play and stop video playback in editing software?

The tool that is primarily used to play and stop video playback in editing software is designed specifically for controlling the playback of media. This tool enables users to preview their edits in real-time, assess transitions, and make necessary adjustments based on what they see and hear.

Effective playback control is essential in video editing, as it allows editors to evaluate the flow of the project, check for synchronization with audio, and ensure that the timing of various elements aligns with their vision. The play/stop function typically provides a simple means of toggling between viewing the video and pausing it, facilitating smooth workflow during the editing process.

Other tools, such as the hand tool, are meant for navigating the timeline or adjusting positioning, while the rate stretch tool alters the speed of video clips, and the razor tool is utilized for cutting clips in the timeline. None of these tools primarily focus on controlling video playback, making the play/stop tool the most directly relevant in this context.