Control focus during playback
I am typically recording with 3 video sources:
1) head shot using webcam
2) screen capture
3) powerpoint presentation
This request would allow setting/flag (presumably set during editing) to control which video stream is being displayed in the primary view area. In editing some mark can be placed in the timeline to cause the powerpoint to be displayed in the primary viewing area. Later a mark can be placed in the timeline to cause the screen capture to be displayed in the primary viewing area.
While the user watching the video can always override this, there are times when the video creator wants to draw the focus of attention to something in particular to at least temporarily ensure that stream is being viewed.