autoplay

/AO1 T AH0 P L EY1/
noun
  1. 1

    Any software feature that plays (a video, a compact disc, etc.) automatically.

verb
  1. 1

    To play automatically.

    โ€œUsers may leave a Web site in frustration if a video autoplays when they visit.โ€

Source: https://en.wiktionary.org/wiki/autoplay