[1] Allow delaying autoplay until video elements become visible ( (Zhiqiang Zhang著, 2016-06-09 23:03:09 +09:00)) <https://github.com/whatwg/html/commit/8ebd581ea848c476368e5f25ee3a3c31803b29fa>

[2] Allow delaying autoplay until video elements become visible ( (Zhiqiang Zhang著, 2016-06-09 23:03:09 +09:00)) <https://github.com/whatwg/html/commit/8ebd581ea848c476368e5f25ee3a3c31803b29fa>