If I was working on one monitor, the image part would be just as small, if not smaller. I had to make the monitor with the interface and the task-sheet larger, to make the text readable.
Perhaps I’m just not following your setup, I assumed you probably have two (similarly sized?) 4K monitors side by side you work on. I just meant while you’re talking about what is happening more in the left screen, such as visible differences between sources or various levels of filtered content, it would be nice to make that the larger of the two for those moments. Assuming that the sizes of the individual screens in your video was a conscious choice, rather than an inherent workspace recording limitation as you might get if this is a 1080p monitor next to a 4K monitor, or that whatever you used to record or put together these two screens didn’t force you to choose a dominant one for the duration.