[1] [CITE@en[HTML5 Revision Tracker]]
([TIME[2010-02-27 13:05:44 +09:00]] 版)
[2] [CITE@en[Web Applications 1.0 r6858 Define the meaning of preload='' values while the video is playing.]]
( ([TIME[2011-12-10 06:46:00 +09:00]] 版))
[3] [CITE[''''''[''''''whatwg'''''']''''''