The Sony RX10, (at the left), is my best camera, but it has a defect, it shuts down automatically after 30 minutes video recording, so usually I use a second, cheaper camera, (an old Canon), for to have also a continuous video recording of the full spin, without interruptions.
If I want to submit the record attempt to RecordSetter, I send them the lower quality video recording without interruptions.
I use the best quality video recording of the other camera for to make a short video for YouTube.
In this case it happened that the video of the best camera was not so good because a bit out of focus. So I decided to include both the video recordings in the same frame for to shrink them and make the out of focus less evident.