FLV video files are not yet supported.
Steps to Reproduce:
1. Open IMPRESS
2. Go to INSERT -> MOVIE AND SOUND
3. Assure that ALL MOVIE AND SOUND FILES as type is selected
4. Go to a directory with a FLV file
FLV is not a supported video type.
It would be good to be able to also insert and play FLV files.
Operating System: Windows 7
Version: 18.104.22.168 release
Seems like a valid enhancement request. Therefore I mark this as NEW. I can't find any duplicate for this one.
This has been added for LibreOffice 4.1.
It will be released in July 2013.
@Samuel: Thank you very much!