Best practices for multimedia (acrl.ala.org)
• Include captions and transcripts for video and audio, and descriptive alternative text for images.
• Avoid using color alone to convey information; if unavoidable, use a color contrast checker.
• Avoid animations, but if using them, describe them sufficiently.
• Avoid the use of Flash; use HTML 5.0 instead.
• Avoid bright, flashing graphics that may cause photo epileptic seizures.