In this demo file, which needs to be downloaded to your own computer and opened with Adobe Reader (or Acrobat), shows how to create a rollover animation. When the user rolls over the rollover-word, an animation is made visible and automatically plays. The aeb_pro package dated 2018/02/17 or later is required.
Download the file ro-autoanime.pdf and enjoy. The source file is attached to the PDF.
A related article is AeB Pro: \texHelp* and auto-anime