Today we have discovered a FLV player bug in Yj Image Slider 3.0 module . Download files have been updated. Affected file is  your_site_name/modules/mod_yjis3/src/yjmmbox.js.  Path to mediaplayer.swf was wrong and this way was not able to play flv , swf  files. If you have already populated the module settings and do not like to perform the full reinstall , download the new file version , extract it , move file 

your_site_name/modules/mod_yjis3/src/yjmmbox.js      from new download to your server

overriding the existing one. Make sure you refresh the page before testing.