In the beneath image you presumably can see that the source focusing on has been moved to video monitor V3 and audio tracks A3 and A4. When clips are added from the source window, that is where they will be placed. When you drag a clip to the timeline, Premiere will routinely overwrite the overlapping portion of the existing clip with the new clip. You can also highlight a portion of the video as you preview it within the Source pane, to pull a variety into the timeline, quite than an entire video clip. If you’re uncertain of the video settings on your digicam, Premiere can automatically match the sequence settings for you. Premiere Pro CC 2019 will do that mechanically when you drag a video clip out of your Project pane into the Timeline.