With the release of Littlstar Cinema version 1.23, we were forced to change the parsing of sideloaded video filenames. 360° videos now require "360" in the filename (myvideo_360.mp4 or myvideo_360_ou.mp4). In previous versions of the app the default video type was 360 so it was not required in the filename. After version 1.xx the default is fixed frame.
In the Littlstar Cinema version 1.25 release we added the ability to control and save metadata information about your videos from within our app's UI. You can read more about controlling metadata specifically, and sideloading in general, in our official guides.