Officially, OG is not supported to manually flash the firmware, but it is possible. If you contact the right Wyze engineer then they can send you a firmware to manually flash based on the posts below:
Hi @dave27 @robughblah ,
We made a special firmware to collect more logs for motion detection zone issue. Would it be possible to flash this onto your device and send us the log when the issue occurs again? I’ve shared the 1.0.83 firmware file with @dave27 . @robughblah could you send me your email address to ltan[at]wyze[dot]com so I can share you the file too?
Last update is the final release of the firmware is still being tested etc, not sure if they have a specific date yet.
It does appear possible to manually load firmware on the OG however they do not make the files available on the site as you’ve seen. You can send @WyzeDesmond and/or @WyzeLi your camera MAC address(es) to get the 1.0.83 update in the meantime.
The funny thing is, the whole 1.0.82 debacle proved that the OG CAN do manual firmware updates. They just don’t post the files. Originally they were sending the .bin file for 1.0.83 but when I told them I had cams it would be a real pain to update that way, they figured out they could push it by MAC address.