HTML5 Video Autoplay not working correctly

Question

Im using this code:

Answer 1

Mobile browsers generally ignore this attribute to prevent consuming data until user explicitly starts the download.

UPDATE: newer version of mobile browser on Android and iOS do support autoplay function. But it only works if the video is muted or has no audio channel:

Some additional info: https://webkit.org/blog/6784/new-video-policies-for-ios/