Sorry I should have been clearer, the no name H264 can be viewed via a WAN with the suppliers app but not Blynk as it goes through a server provided by the supplier.
I can't port forward but I'm pretty sure it wouldn't be available through Blynk.
It's like the Tenvis T8805 mentioned in this thread that is locked to the suppliers app. Slight difference with mine is that the manufacturer in China said only their app can access the camera and that's not the case as Blynk is fine on a LAN as is VLC etc. I do have a convoluted way of circumnavigating the port forwarding requirement so I might check the WAN one day.
My older Tenvis isn't locked down so as long as it's port forwarded it should be ok. So in some ways you need to be looking for the older models but they don't offer the picture quality of the newer models.