a.k.a. auto play, autoplay
When a video plays automatically on your browser without you first hitting play, it also describes when an audio online ad starts playing without your input.

Historical perspective: Google switched off auto-play in 2018, according to, to make browsing the internet a little less irritating. The Chrome web browser blocks auto-play videos that aren’t muted.
See also : browser  
NetLingo Classification: Net Programming