Please check the OS of your PC. Live streaming can work on the following OSs.
* Windows10 (version1703) or later
* macOS Sierra (version 10.12.4) or later
If live video is not displayed with OBS in Windows 10 (version 1703) or later, please try the following driver. Please be aware that there is no guarantee it will work.
Click here.(64bit OS only)
Open the Windows settings screen [⚙] and select [Apps]. If "RICOH THETA UVC 4K" is displayed in the list of apps, uninstall it, and then click the above link to install the driver.