On https://commons.wikimedia.org/wiki/File:New_medical_editor.ogv?embedplayer=yes
TypeError: Cannot read property 'split' of undefined /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 Object.getMIMETypePlayers (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 Object.defaultPlayer (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 Object.isPlayableType (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 Object.getPlayableSources (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 Object.autoSelectSource (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 HTMLDivElement.setupSourcePlayer (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 eval (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 doCallbackCheck (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 HTMLDivElement.eval (eval at () /w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:4:681 Object.eval (eval at ()
On https://commons.wikimedia.org/wiki/File:New_medical_editor.ogv?debug=true&embedplayer=yes
TypeError: Cannot read property 'split' of undefined /w/extensions/TimedMediaHandler/MwEmbedModules/EmbedPlayer/resources/mw.MediaPlayers.js?00803:95:30 Object.getMIMETypePlayers() /w/extensions/TimedMediaHandler/MwEmbedModules/EmbedPlayer/resources/mw.MediaPlayers.js?00803:118:26 Object.defaultPlayer() /w/extensions/TimedMediaHandler/MwEmbedModules/EmbedPlayer/resources/mw.MediaElement.js?ca54f:430:40 Object.isPlayableType() /w/extensions/TimedMediaHandler/MwEmbedModules/EmbedPlayer/resources/mw.MediaElement.js?ca54f:476:15 Object.getPlayableSources() /w/extensions/TimedMediaHandler/MwEmbedModules/EmbedPlayer/resources/mw.MediaElement.js?ca54f:165:30 Object.autoSelectSource() /w/extensions/TimedMediaHandler/MwEmbedModules/EmbedPlayer/resources/mw.EmbedPlayer.js?adda9:685:22 HTMLDivElement.setupSourcePlayer() /w/extensions/TimedMediaHandler/MwEmbedModules/EmbedPlayer/resources/mw.EmbedPlayer.js?adda9:612:11 /w/load.php?debug=true&lang=en&modules=Spinner%7Cext.tmh.embedPlayerIframe%7Cjquery.loadingSpinner%2CmwEmbedUtil%2CtriggerQueueCallback%7Cmw.MwEmbedSupport%7Cmw.MwEmbedSupport.style&skin=vector&version=2ae5dca68f52:185:5 doCallbackCheck() /w/extensions/TimedMediaHandler/resources/mw.MediaWikiPlayerSupport.js?89fbf:328:5 HTMLDivElement.() /w/load.php?debug=true&lang=en&modules=Spinner%7Cext.tmh.embedPlayerIframe%7Cjquery.loadingSpinner%2CmwEmbedUtil%2CtriggerQueueCallback%7Cmw.MwEmbedSupport%7Cmw.MwEmbedSupport.style&skin=vector&version=2ae5dca68f52:193:28 Object.()
getMIMETypePlayers @ mw.MediaPlayers.js?00803:95 defaultPlayer @ mw.MediaPlayers.js?00803:118 isPlayableType @ mw.MediaElement.js?ca54f:430 getPlayableSources @ mw.MediaElement.js?ca54f:476 autoSelectSource @ mw.MediaElement.js?ca54f:165 setupSourcePlayer @ mw.EmbedPlayer.js?adda9:685 (anonymous function) @ mw.EmbedPlayer.js?adda9:612 doCallbackCheck @ load.php?debug=true&lang=en&modules=Spinner|ext.tmh.embedPlayerIframe|jquery.loadingSpinner%2CmwEmb…:185 (anonymous function) @ mw.MediaWikiPlayerSupport.js?89fbf:328 (anonymous function) @ load.php?debug=true&lang=en&modules=Spinner|ext.tmh.embedPlayerIframe|jquery.loadingSpinner%2CmwEmb…:193 each @ load.php?debug=true&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:384 $.fn.triggerQueueCallback @ load.php?debug=true&lang=en&modules=Spinner|ext.tmh.embedPlayerIframe|jquery.loadingSpinner%2CmwEmb…:192 checkPlayerSources @ mw.EmbedPlayer.js?adda9:611 (anonymous function) @ mw.processEmbedPlayers.js?209a7:115 $.fn.triggerQueueCallback @ load.php?debug=true&lang=en&modules=Spinner|ext.tmh.embedPlayerIframe|jquery.loadingSpinner%2CmwEmb…:163 runPlayerSwap @ mw.processEmbedPlayers.js?209a7:112 addPlayerElement @ mw.processEmbedPlayers.js?209a7:131 (anonymous function) @ mw.processEmbedPlayers.js?209a7:342 each @ load.php?debug=true&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:384 each @ load.php?debug=true&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=f47W3i0j:136 mw.processEmbedPlayers @ mw.processEmbedPlayers.js?209a7:334 (anonymous function) @ jquery.embedPlayer.js?be9ff:43
and the player doesn't appear eather, just a still-frame.