In 2nd clip of Tutorial 1 showing placing images, I was unable to do this. The file start_indesign_create-brochure was saved in my Downloads. It didn't show up under Importable Files but did in All Files. However when I tried to open, message read 'cannot place this file. No filter found for requested operation'
Please move the folder titled start_indesign_create_brochure to another location on your computer first.
In the 2nd video, the presenter chooses the Place command from the File menu. (00:16) Navigate to where you downloaded the Assets folder for the tutorial. Hold the shift key to select all the assets (graphics) numbered 01-06 at once. This is similar to having a "loaded gun" that you can click to place all graphics sequentially in various locations on both pages of the brochure.
Hope this helps! Let me know if you have further questions.