What accessibility features should be included when using sound or video in your high-fidelity prototype? Select all that apply.

1. Closed Captions/Subtitles: These are crucial for individuals who are deaf or hard of hearing. They provide a text description of what is being said or any important sounds that are happening in the video.

2. Audio Descriptions: This is a narration of all the important visual details in the video that can't be understood from the audio alone. This is especially useful for individuals who are blind or have low vision.

3. Volume Control: Users should be able to adjust the volume of the audio or video content. This is important for individuals with varying degrees of hearing ability.

4. Transcripts: Providing a written version of all spoken content can be helpful for individuals who prefer to read or who may not be able to hear the audio.

5. Clear Visuals: Ensure that any important information in the video is also presented visually for those who can't hear the audio.

6. Keyboard Controls: Users should be able to control the video (play, pause, rewind, etc.) using the keyboard. This is important for individuals who may not be able to use a mouse or touchscreen.

7. Sign Language Interpretation: For videos that contain important information, consider including a sign language interpreter for those who communicate using sign language.

8. Avoid Auto-play: Auto-playing videos can be disorienting for some users, especially those with cognitive disabilities. It's best to let users choose when to play the video.

Remember, the goal is to make your prototype as accessible as possible to all users, regardless of their abilities or disabilities.