When a normal camera app changes camera, it tears down the capture session and builds a new one. The encoder stops with it, the file is finalised, and anything you record afterwards is a second file. That is why switching usually means stopping.
Talk2Camera keeps the encoder running and changes only where the frames come from. The recording never ends, so there is no second file and no join. On hardware that cannot run both cameras at once, a held frame covers the moment the incoming camera takes to open, so the timeline never stalls.
What this means in practice: you can change what the viewer is looking at mid-sentence, and what you get is one continuous clip. No stitching, and no cut to disguise.
