'Attr.ownerElement' is deprecated and has been removed from DOM4 (http://w3.org/tr/dom).
'HTMLVideoElement.webkitDisplayingFullscreen' is deprecated. Please use the 'fullscreenchange' and 'webkitfullscreenchange' events instead.
'HTMLVideoElement.webkitSupportsFullscreen' is deprecated. Its value is true if the video is loaded.
Uncaught TypeError: Converting circular structure to JSON
http://stackoverflow.com/questions/2303713/how-to-serialize-dom-node-to-json
这个问题的问题描述已经很清楚的说明了原因。
看log好像是你在尝试转化一个存在循环引用的对象。