Articulate Storyline Re-size Issues

Hello! I have made a test module and discovered that the blurriness I see on the Review forum is a result of my original screen recording video being 1920px by 1080px but the original slide size was smaller. I figured out how to make my slide size larger to fit the larger file size for the screen recording. In the "Slide Size" settings, I entered the correct size I need and checked "Lock aspect ratio (16:9)" and "Scale existing content to fit", then clicked "Okay". Any photo that I manually added was able to be adjusted to the slide size but all of my screen recording (most of this module) is not adjusting and there is no way to open size settings on them, even when I try to individually edit them in each slide. Is there anyone that may know what I am doing wrong? I already created these test modules start to finish, so I need a solution for editing after it has been added, if there is one! Thank you in advanced for the help!