UPDATE 2018, Sept 15: We can now save a 4K video for 45 minutes and a 2K video for 77 minutes. See the top below. Thank you for your contributions.
The 25 minute limit for the THETA V appears to be limited to the implementation of the RICOH THETA WebAPI. As the Plug-in Camera API is using fairly standard Android OS libraries, it looks feasible to save a video longer than 25 minutes to the internal camera storage.
Does anyone have a code example of saving the THETA V video to internal storage so we can test if it’s possible to save longer video inside the camera?