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我需要做什麼來獲得播放器大小的視頻縮略圖 - 就像Youtube一樣？og：時間軸中的視頻和縮略圖大小
我已經複製幾乎所有的Open Graph元標籤：
<meta property="og:title" content="Lloyd - Be The One ft. Trey Songz, Young Jeezy">
<meta property="og:description" content="Music video by Lloyd performing Be The One. (C) 2011 Interscope Records">
<meta property="og:type" content="video">
<meta property="og:image" content="http://i4.ytimg.com/vi/cLwnojWx0Ac/hqdefault.jpg">
<meta property="og:video" content="http://www.youtube.com/v/cLwnojWx0Ac?version=3&autohide=1">
<meta property="og:video:type" content="application/x-shockwave-flash">
<meta property="og:video:width" content="398">
<meta property="og:video:height" content="224">
<meta property="og:site_name" content="YouTube">
我只留下OG：URL標記。但它仍然不起作用。