Add support for videos

[Vincent Privat]

The tool is currently not aware of Flickr videos and only imports the preview as an image to Wikimedia Commons.

Example:

https://www.flickr.com/photos/gsfc/2552233821/

https://commons.wikimedia.org/wiki/File:Katrina_Time_Warp_(2552233821).png

Some documentation on Flickr videos support:

https://code.flickr.net/2008/05/01/videos-in-the-flickr-api/

https://code.flickr.net/2009/03/02/videos-in-the-flickr-api-part-deux/

[Masum Reza]

I’d like to see this feature too.