I have managed to get video and audio on Gear.
For video you need to download from their site
http://www.saidoku.com Panasonic video converter, then put into it some small asf file (made for example with Apex WMV ASF Converter) and transfer this file to Gear using Panasonic converter. During the transfer needed directories will be created on SD card and after that you will be able to put asf video files directly to SD card.
For audio you will need to have MOOCS player installed. I have found link to it on one Russian forum:
http://www.sendspace.com/file/ryd9jr
Of course before installing those programs you will need to switch your computer to Japanese language.