3 ms·

It's not youtube doing that, but chrome. The html5 video element doesn't start playback until the tab first gets focus.

• FreeFull 9y ago
  Firefox has the same thing, but you have to enable it in about:config
  • kibwen 9y ago
    Do you have to enable it? I use Firefox Nightly, and have been observing this behavior for a long, long time. It's one of those things that's so minor and yet so important that I wonder how I went without it for so long.
    • fiveseven_ 9y ago
      I believe it is enabled by default now, and the value in about:config is `media.block-autoplay-until-in-foreground`
      • cpeterso 9y ago
        Thanks for the pref name. The feature is currently enabled by default only in the Firefox Nightly channel but you can use the pref to enable it in the Beta or Release channels. https://bugzilla.mozilla.org/show_bug.cgi?id=1352014 https://bugzilla.mozilla.org/show_bug.cgi?id=1352014
      • bigbugbag 9y ago
        It's disabled by default on regular firefox. I prefer to disable media.autoplay.enabled which is enabled by default.