There’s no way of doing it without modifying the engine due how render targets work in UE4.
I managed to do that however it requires to modify several engine lines of code. I have an usable UCineCameraCaptureComponent for UE4.22 (I didn’t port it to 4.23 yet), but it requires to build the Engine from source.
If anybody need it I could create a guide on how to do that.