I copy below the contents of http://commons.wikimedia.org/wiki/Commons:Village_pump#mwEmbed_gadget:_Videos_no_longer_properly_linked_to_description_pages_by_clicking_on_the_thumbnail
Until a short time ago, you could access the file description page of videos by clicking on the thumbnail. As you can check with the polar bear video I attach here, it does not seem to be possible any longer. Does anyone know why it is so ? I think this change must be reverted, because
#) free licenses require to make the licensing information available to readers/viewers
#) even in the case of public domain videos, the uploader should have some form of recognition for his work (the readers/viewers should be able to easily find his user name)
#) Description pages often contain valuable information about the circumstances when the video was taken, which might be useful to readers/viewers.
(I know that the small "enlarge" icon is still available, but in my opinion this is too small, and I guess that only a limited number of viewers are likely to click on this icon).
[[User:Teofilo|Teofilo]] ([[User talk:Teofilo|<span class="signature-talk">talk</span>]]) 12:11, 10 October 2011 (UTC)
:No problem on my end, I can click on the thumbnail which takes me to the File:Polar2001.ogg description page. (using the MonoBook skin) [[User:Bidgee|Bidgee]] ([[User talk:Bidgee|<span class="signature-talk">talk</span>]]) 12:16, 10 October 2011 (UTC)
::I have tried changing my skin to monobook but it is still the same (a "play clip" button is displayed on the thumbnail, which starts the video instead of taking me to the file description page). An other problem is that the "Credits" that display after clicking on the circled "i" in the "menu" is empty. In my view, this "credits" menu option should redirect to the file description page. Also the "embedd on page" "copy code" should include licensing information and author name. Embedding on page without licensing information is a violation of the license. [[User:Teofilo|Teofilo]] ([[User talk:Teofilo|<span class="signature-talk">talk</span>]]) 12:28, 10 October 2011 (UTC)
:::As I was trying my best to use Firefogg (See #Cutting videos into parts smaller than 100 MB with or without Firefogg above) I had turned the "Add mwEmbed support for Kaltura Sequencer, Video Playback, Firefogg uploading" gadget in my user preferences. I have removed that gadget and everything is OK again. [[User:Teofilo|Teofilo]] ([[User talk:Teofilo|<span class="signature-talk">talk</span>]]) 13:14, 10 October 2011 (UTC)