Hello altogether and a happy new year,
In addition to firefox I frequently use midori as a browser. Normally I'm quite satisfied with it. Yet there's one thing that keeps annoying me. Whenever I want to watch a video on youtube I can only get the audio. But there's no video at all. As far as I know midori does support HTML5, so theoretically everything should work.
Any suggestions are welcome.
Thanks a lot in advance.
Rosika 
P.S.:
system: Linux/Lubuntu 16.04.1 LTS, 64 bit
kernel version: 4.4.0-59-generic x86_64
I found this in the Midori FAQ's...
HTML5 Video/ Audio doesn't play
Midori uses GStreamer for HTML5 audio and video support. Codecs, which handle particular formats of audio or video, are provided by GStreamer plugins which may need to be installed separately. Midori may be built with GTK+2 or GTK+3 (visit about:version to check), which correspond to GStreamer versions of 0.10 or 1.0 respectively.
You need gstreamer(0.10/1.0)-pulse if you're using PulseAudio.
You may need gstreamer(0.10/1.0)-alsa for ALSA, depending on your distribution.
You need plugins for Theora, gstreamer(0.10/1.0)-base and MPEG-4 incluing aac (e.g. gst-plugins-faad), gstreamer(0.10/1.0)-bad. For WebM, you'll need plugins for vorbis (-base), matroska (-good), and vp8 (-bad). Have a look at http://www.gstreamer.net/documentation/plugins.html for details.
For Youtube or Vimeo, you need WebKitGTK+ 1.1.20 or newer.
You can test your installed codecs here..
You can look at about:version to see which video codecs you have installed.
Hi David,
thanks a lot for your reply.
My midori-version is configured like this:
Midori 0.5.11 ((null)) Midori
GTK+ 2.24.29 (2.24.30) Glib 2.47.3 (2.48.2)
WebKitGTK+ 2.4.9 (2.4.11) libSoup 2.52.2
cairo 1.14.4 (1.14.6) libnotify No
gcr 3.18.0 granite No
Platform X11; Linux x86_64
Identification Mozilla/5.0 (X11; Linux) AppleWebKit/538.15 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/538.15 Midori/0.5
Video Formats H264 [x] Ogg Theora [x] WebM [x]
Netscape Plugins:
Shockwave Flash Shockwave Flash 24.0 r0
As far as gstreamer is concerned I found the following on my system:
ii gstreamer1.0-nice:amd64
ii gstreamer1.0-plugins-bad:amd64
ii gstreamer1.0-plugins-bad-faad:amd64
ii gstreamer1.0-plugins-bad-videoparsers:amd64
ii gstreamer1.0-plugins-base:amd64
ii gstreamer1.0-plugins-good:amd64
ii gstreamer1.0-plugins-ugly:amd64
ii gstreamer1.0-plugins-ugly-amr:amd64
ii gstreamer1.0-pulseaudio:amd64
ii gstreamer1.0-x:amd64
Despite all your help I don´t seem to be able to figure out what´s missing and what I can do about it.
Thanks anyway and have a nice weekend.
Rosika
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