{"action":"created","comment":{"url":"https://api.github.com/repos/ampproject/amphtml/pulls/comments/51494785","id":51494785,"diff_hunk":"@@ -36,7 +36,31 @@ export function installVideo(win) {\n     }\n \n     /** @override */\n+    prerenderAllowed() {\n+      return true;\n+    }\n+\n+    /** @override */\n+    buildCallback() {\n+      /** @private */\n+      this.realPreloadAttrValue_ = this.element.getAttribute('preload');\n+      const posterAttr = this.element.getAttribute('poster');\n+\n+      if (!posterAttr) {\n+        console/*OK*/.warn(\n+            'No \"poster\" attribute has been provided for amp-video.');\n+      }\n+    }\n+\n+    /** @override */\n     layoutCallback() {\n+      const docState = documentStateFor(this.getWin());\n+      // Disable video preload in prerender mode and reset it when rendered.\n+      if (docState.getVisibilityState() === 'prerender') {","path":"builtins/amp-video.js","position":33,"original_position":33,"commit_id":"f2251f9469ee0686e0e11ff4ef1274d6565d87d5","original_commit_id":"f2251f9469ee0686e0e11ff4ef1274d6565d87d5","user":{"login":"dvoytenko","id":726049,"avatar_url":"https://avatars.githubusercontent.com/u/726049?v=3","gravatar_id":"","url":"https://api.github.com/users/dvoytenko","html_url":"https://github.com/dvoytenko","followers_url":"https://api.github.com/users/dvoytenko/followers","following_url":"https://api.github.com/users/dvoytenko/following{/other_user}","gists_url":"https://api.github.com/users/dvoytenko/gists{/gist_id}","starred_url":"https://api.github.com/users/dvoytenko/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dvoytenko/subscriptions","organizations_url":"https://api.github.com/users/dvoytenko/orgs","repos_url":"https://api.github.com/users/dvoytenko/repos","events_url":"https://api.github.com/users/dvoytenko/events{/privacy}","received_events_url":"https://api.github.com/users/dvoytenko/received_events","type":"User","site_admin":false},"body":"Is this just document prerender? What about AMP prerender? Should it be also `preload=none`?","created_at":"2016-02-01T22:51:23Z","updated_at":"2016-02-01T22:51:23Z","html_url":"https://github.com/ampproject/amphtml/pull/1718#discussion_r51494785","pull_request_url":"https://api.github.com/repos/ampproject/amphtml/pulls/1718","_links":{"self":{"href":"https://api.github.com/repos/ampproject/amphtml/pulls/comments/51494785"},"html":{"href":"https://github.com/ampproject/amphtml/pull/1718#discussion_r51494785"},"pull_request":{"href":"https://api.github.com/repos/ampproject/amphtml/pulls/1718"}}},"pull_request":{"url":"https://api.github.com/repos/ampproject/amphtml/pulls/1718","id":57911165,"html_url":"https://github.com/ampproject/amphtml/pull/1718","diff_url":"https://github.com/ampproject/amphtml/pull/1718.diff","patch_url":"https://github.com/ampproject/amphtml/pull/1718.patch","issue_url":"https://api.github.com/repos/ampproject/amphtml/issues/1718","number":1718,"state":"open","locked":false,"title":"Allow prerendering amp-video 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