I was having the same black screen problem yesterday. My guess is that there is some buffering or lag issue. I just tried playing the two videos that you mention and the first one was loading so slow that I could play the video faster than it would load new frames, which shouldn't be the case with my internet connection. The second video played OK. It does seem to me that there may be a playback or buffering problem on WMF's end.

Pine

On Sun, Nov 29, 2015 at 1:41 PM, <Ingo.Sisa@gmx.net> wrote:

Hi, are there any problems with playback of videos at the moment? De:Benutzer:Fice told me playback of the file https://commons.wikimedia.org/wiki/File:Prachtlibelle_-_2015-08-03.webm produces a black screen on his system (Win10/64 + Firefox). And User:LudwigSebastianMicheler noticed another playback problem on https://commons.wikimedia.org/wiki/File:Baccha_elongata_%282%29_-_2015-07-31.webm (playback is jerking). However on my system (Win7/64, SeaMonkey 2.39) both files play fine. Is anybody able to reproduce this strange behaviour? Thanks, Ingo

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