As far as I know, V2, V3, V3 Pro, V4’s recordings playback fine in the app as long as you don’t power cycle them even with the network is offline. I did a 4 hour test with the network being offline and the V3 could playback fine in the app.
On the other hand, the OG will record for an additional 30 minute after your network goes down even if you didn’t power cycle them. Afterwards, it starts generating a random dated folder to save the recordings. You will need to physically remove the micro SD and play it back on a PC or a phone. Having said that if you know the folder date, then I believe you can play it back in the app as well.
Recently, the latest beta 4.36.12.9357 and 4.58.12.9357 firmware that was released for V3 and V3 Pro respectively mimics OG behavior above so I don’t recommend you updating to that firmware as noted here and here if you have them.
They also released 4.49.12.9357 beta for Cam Pan V2, but I don’t know if it has the same behaviour. I am guessing they probably used the same firmware branch based on their naming convention.