Prior to that announcement, I made another guide for accessing the media from a USB stick.
I don’t have a sony playstation right now for testing, but the graphics below show the MP4 videos in equirectangular mode that I saved from my Windows computer to the USB stick. Note that I have all the files in a single folder on the USB stick called, DCIM. Also note that these files were converted with the RICOH desktop application from dual-fisheye to equirectangular.
Select the device that the THETA Media is stored on.
Press the options button on your PlayStation controller. You must select VR Mode to view the images in your headset.
Turn on VR Mode.
The videos worked on the USB when I did my test. If it works on your desktop computer, you should be able to get it to work on the PSVR